Apple has encrypted the battery of iPhone XS and models above. Once you replace the battery, you will get the “Important Battery Message” and “Service” message. To make matters worse, the cycle count of the new battery will show the cycle count of the original battery. Especially the battery data of iPhone 11 series and iPhone 12 series still can’t be accessed. It has been verified by technicians that the “Important Battery Message” will show up after you put in an aftermarket battery or a genuine Apple battery. You can only avoid the problem by letting Apple Stores or Apple Authorized Service Providers replace your battery.

To solve the problem, REWA LAB has verified the latest solution. Today we will share solutions concerning iPhone XS series, iPhone 11 series and iPhone 12 series.

First of all, we will introduce the structure of the battery. The battery can be roughly divided into two parts – BMS board and battery cell. The battery management system board mainly serves as a protection board but also saves battery data. The battery cell is where the power is stored.

Taking iPhone XS for example, we need to prepare a battery data corrector and a new battery cell that can be an original one or an aftermarket one. Disassemble the phone and remove the battery.

Then we need to solder the BMS board of the original battery to the new battery cell. Remove the protective tape on the BMS board. Please do not break the flex cable.

Disconnect the cathode and anode of the battery with a pair of scissors.

Remove the original battery BMS board. Please align the anode and cathode respectively.

Solder with the Spot Welder.

After soldering, install the BMS board. Apply the protection tape.

Since the BMS board is replaced and the battery is protected, the voltage can’t be measured. We need to activate the battery with a Direct Current Supply.

Connect the battery to the programmer. Click reading. Battery data on the BMS board can be seen.

Recalibrate the cycle times and battery efficiency.

Then we connect the display to the motherboard. Connect the power cable to turn on the phone. “Important Battery Message” is displayed.

Please be noted that you can only turn on the phone by a power cable. The above step takes advantage of bugs in iOS and is a very important step. Then we install the new battery. Go to “Settings” to view the battery health information. The maximum capacity is 100% and there is no “Important Battery Message”.

Different from iPhone XS series, the battery data of iPhone 11 series and iPhone 12 series is encrypted and cannot be accessed. That is to say, even if you replace with the original battery cell, the battery data still can’t be read. Worse still, you can’t correct the battery health and cycle count. Recently, REWA LAB has got the latest battery data corrector on the market. Through verification, the corrector can effectively remove the “Important Battery Message” of iPhone 11 series and iPhone 12 series. Next, we will share the operation process in detail by an iPhone 11 Pro.

Remove the BMS board of the original battery. Solder the BMS board to the new battery cell.

Install the BMS board. Activate the battery with a Direct Current Supply.

Because the data of iPhone 11 series can’t be directly read, we need a specialized PCB board to read the data. Install the PCB board to the battery.

Then connect the battery to the programmer. Click reading. Recalibrate the cycle times and battery efficiency.

Connect the power cable to turn on the phone. “Important Battery Message” is displayed.

Then we install the new battery. Go to “Settings” to view the battery health information. The maximum capacity is 100% and there is no “Important Battery Message”. This method is easy to operate with visible repair traces. REWA technicians are now trying to remove the. “Important battery message” of iPhone 11 series and iPhone 12 series without traces. That’s all for REWA LAB’s solutions to the “Important Battery Message” problem. With the development of repair technology and Apple’s continued attention, we believe that new solutions will come up. REWA LAB will keep on bringing the latest information and technology. Please stay tuned. You can buy all tools and supplies in this article on REWA shop. Please feel free to leave a comment on repair topics that you are interested in.

In the previous blog: What Should A Qualified Battery Actually Be , REWA explained when should a battery be replaced and what standards we applied towards battery replacements. Now we will demonstrate the detailed production process and test procedures. Top quality batteries come from excellent materials, advanced automation equipment, and strict inspection&test standards. In the top-level factories, phone battery is usually carried out on highly automated equipment, with top quality materials applied. However there are still many smaller manufacturers who use manual assemble methods or poor materials, that is why the batteries in the market vary greatly. What should a complete battery production process be?

Production Process

Battery appearance inspection is a common but easy way to inspect your phone batteries, but it does not always work, lacking precise values and results. Some battery failures are not so easy to spot with naked eyes. However, the strict test is necessary for the lithium batteries to ensure safety and quality. Here we will demonstrate the professional and complete test procedures. The test can be divided into three parts: Appearance Inspection, Basic Performance Test and Physical Performance Test.

Appearance Inspection

Appearance Inspection: breakage, paint loss, crack, corrosion, labeled data

Basic Test Methods and Procedures

Physical Performance Test Procedures Further physical performance tests are conducted in the extreme situations, so as to verify if the battery will bend, deform, fire and explode in the different simulative environments.

1. Low-Pressure High Altitude Simulation Test This procedure is to test the air transportation safety performance of the battery at a pressure under 11.6kPa. Result: After 360 minutes, all the samples perform normally, no fire or explosion. /The samples do not explode or catch fire.

2. Temp. & Humi. Test This test is to verify the temperature adaptability of battery, processed at an extreme temperature of 72±2℃ and -40±2℃. Batteries are stored for 6 hours at 72±2℃, then 6 hours at -40±2℃, for a total of 10 cycles. Result: After 10 cycles, all the samples perform normally. No bulge, fire or explosion./ The samples do not explode or catch fire

3. Vibration Test Vibration test is used to verify the battery anti-vibration performance during the transportation and usage. The test is a Sine Sweep: 7Hz – 200Hz, 15 min/sweep, 12 times, 3 hours in total Result: All the samples perform normally

4. Capacity Test This is to test the actual capacity of the battery Result: OEM is the top performer. AAA Grade and A Grade come second, and the values are very close. B grade batteries are much worse than the above 3 kinds.

5. Impact Test Impact test simulates the impacting and hitting of the battery. Apply 561.5cm/s2 acceleration impact to the battery to test if it will be crushed or distorted when overload. Result: B grade batteries have problems of bend and deformation. Other samples perform normally.

6. External Short Circuit Test This test simulates an external short circuit to the terminals of the cell or battery. When the temperature goes up to 55℃, turn on the switch to make it short circuit, then check the battery to see if it will explode. Result: After 2 hours standing, all the samples perform normally. No fire or explosion. /The samples do not explode or catch fire.

7. Drop Test The drop test is operated at a height of 1.2 meters to test the battery hardness and anti-deformation capability. Result: B grade batteries have problems of bend and deformation. Other samples perform normally.

8. Crush Test Each battery is applied with a crushing force of 1.3kN for 0.1s. After 30 minutes, check the battery to see if it will fire, explode or deform. Result: All the samples perform normally.

9. Thermal Abuse Test The purpose of abuse testing is to verify that the battery is not a danger to the user either by accidental or deliberate thermal abuse under any conceivable conditions of use. After the temperature rise for 26 minutes, hold at 130℃ for 10 minutes, check the battery to see if it will fire or explode Result: All the batteries have the problem of bulging, no fire or explosion

10. Burning Test The purpose of this procedure is to test the safety performance of the battery. Put the battery into the machine, ignite it to test if the battery will explode and if the ashes are in clumps. Result: After 30 minutes, batteries burned completely, no explosion, with clumpy ashes left

Every battery from REWA has to pass through rigorous basic performance and physical performance test, and only qualified products can be delivered to the warehouse. This is to ensure every battery you get is superior, safe and reliable.

Certifications

Our business has been founded on the belief “Quality Above ALL” for years. The batteries from REWA passed a series of international authoritative certifications, such as UL, CE, FCC etc..

From all the above test results and analysis, we can draw a conclusion that OEM, AAA and A grade batteries are much better and safer than the B grade. Now that there is a shortage of OEM batteries, the cost-effective AAA and A grade batteries undoubtedly become your first choice.Every battery from REWA has been rigorously tested. Our QC and technical team can offer the right solutions for your needs and advise the best but economical battery replacements. If you have any questions and demands, please feel free to contact us.

Custom packaging is available! Want to order our products? Please contact us:

PRE-SALES Skype: rewatech Email: service@rewa.tech

AFTER-SALES Skype: support-rewatech Email: support@rewatechnology.com

We have received an iPhone X motherboard from a customer. The customer says that the iPhone X battery is draining fast with an overheating issue. Battery draining fast is normally caused by battery degradation or motherboard current leakage. After battery replacement, the battery is still draining fast. It can be judged that the problem is induced by motherboard current leakage.

Next, we check the current by powering up the motherboard with a DC Power Supply. The motherboard has a current leakage of 186 mA. If the motherboard shows a current leakage after being powered up, we can measure the following power supply circuits to find the faulty part.

In the first place, we measure PP_BATT_VCC. The resistance value is normal.

Then we measure PP_VDD_Main. The resistance value is 29 which is relatively low. It indicates that there is a damaged component on PP_VDD_Main. Since the current is small, rosin detecting is unable to find the faulty part. Therefore, we need to use a thermal imager to find the faulty part.

Power up the PP_VDD_Main on the motherboard. There is no obvious change in the temperature. The faulty part is not on the surface layer of the motherboard.

Then we separate the motherboard for further testing. Put the motherboard on the Heating Platform to heat. When the temperature reaches 165 °C, separate the logic board from the signal board.

After the motherboard has cooled, we firstly measure PP_VDD_Main of the logic board. The resistance value is normal.

Then we measure PP_VDD_Main of the signal board. The resistance value is abnormal. So we can confirm that the faulty part is on the signal board.

Open bitmap to confirm the position of PP_VDD_Main. Keep checking the signal board with the Thermal Imager. There is still no obvious change in the temperature. Through the bitmap, we see that PP_VDD_Main also exists under the card reader.

The faulty part is most likely hidden under the card reader. Then we check the back of the signal board with the Thermal Imager. The temperature on the top left corner of the card reader has gone up greatly. We can confirm that the faulty part is on the card reader area.

Then we need to remove the card reader. Apply some Paste Flux to the bonding pad of the card reader. To protect the plastic part of the card reader, apply some low-temperature Solder Paste to neutralize the temperature of the bonding pad.

Next, use helical wind Hot Air Gun at 340 °C to heat the card reader. Try to pry up the card reader with a Pry Blade while heating. When the card reader becomes loose, remove the card reader.

Keep checking the card reader area with the Thermal Imager. The temperature of the card reader area shows significant change. Judging from the bitmap, the part that gets hot is the GSM. Then we need to replace the GSM.

Apply some Paste Flux. Remove the GSM with vertical wind Hot Air Gun at 340 °C. Apply some Paste Flux and middle-temperature Solder Paste to the bonding pad. This is to lower the temperature of the bonding pad.

Clean the bonding pad with Hot Air Gun and Solder Wick. Then clean the bonding pad with PCB Cleaner. Measure the resistance value of PP_VDD_Main.

The resistance value returns to normal. Then we install a known-good GSM. Apply some Paste Flux. Put the GSM in position. Solder with vertical wind Hot Air Gun at 320 °C.

After soldering, measure with multimeter again. The resistance value is normal.

Keep applying some low-temperature Solder Paste to the bonding pad of the card reader. Clean the bonding pad with Hot Air Gun and Solder Wick. Then clean the back bonding pad with Soldering Iron and Solder Wick.

Next, clean with PCB Cleaner. It can be seen that the pins are clean.

Then we install the card reader. Put the card reader in position.

Solder the back bonding pad to fix the card reader with the Soldering Iron. Flatten excessive tin with Solder Wick. Please do not remove the tin while dragging the solder wick. Clean the bonding pad with PCB Cleaner.

Then we recombine the motherboard. Put the signal board on the 165 °C Heating Platform to heat. Apply some Paste Flux to the bonding pad. Align the logic board with the signal board. When the temperature reaches 165 °C, detach the motherboard.

For better recombination, press two sides of the motherboard gently with tweezers.

Then we power up the motherboard for testing. The current is normal. Connect the screen to test. The boot current is also normal. The current leakage problem has been fixed.

An important step for iPhone refurbishment is to change the battery. After battery replacement, the original battery information is gone. The original information includes manufacturer name, date of manufacture, serial number, manufacturer number etc. The battery with non-original information will fail the testing software.

As you can see from the picture above, the reading value is not the same as the original factory default. Therefore, the battery doesn’t pass the testing software.

For enthusiasts, not being able to get all green signs from the testing software spells disaster for them. That is like getting a black spot on your white T-shirt. One flaw has them wondered if they buy a good quality product even if the flaw doesn’t really matter and will not affect the usage.

For sellers, if the product can pass the testing software, the product will have more to prove that it is close to the original one, which can be a solid selling point.

The good news is that REWA LAB recently found that original battery information can be written in the aftermarket battery after testing, which means that aftermarket battery with the original information can pass the testing software.

Below are our testing results.

It is obvious that TI battery performs best in the testing. TI battery with original battery information can pass the testing software for most iPhone models.

To successfully write the battery information, Qianli iCopy 2.1 Repair Programmer is needed. Besides transferring the original battery information, the programmer can also clear cycle life and modify battery efficiency.

Click here to buy high-quality batteries selected by REWA.

There are three OEM screen assembly suppliers for iPhone 7, iPhone 7 Plus, iPhone 8, and iPhone 8 Plus while there are only two OEM screen suppliers (LG and JDI) for iPhone XR and iPhone 11. The backlight numbers of the three suppliers are LG - DTP & C3F, Sharp - DHK & C01, Toshiba - C11 & F7C. 

LG is the universal version with high compatibility while Sharp and Toshiba feature poor compatibility.

If your original screen is LG and you want to replace it, your best choice would be LG because it has superior compatibility and is not easy to have a touch problem. If your original screen is Sharp and Toshiba, you can choose the corresponding screen type and LG will work too as it is the universal version.

If you want to replace your screen with one of these screens, your original screen must be OEM, Pull, or REFURB with the original backlight.

Display Comparison (iPhone7 and iPhone 8)

Display Comparison (iPhone 7Plus and iPhone 8 Plus)

Display Comparison (iPhone XR and iPhone 11)

Very much like some other artificial item, built-in lithium-ion batteries in an iPhone have a restricted life expectancy. In the end, they get worn out and quit displaying maximum performance, bringing about arbitrary rebooting and battery drain issues. In addition to that, worn-out batteries may likewise make the iPhone overheat.

When you get your battery replaced from a non-Authorized Apple service center, Apple begins showing a Genuine battery message alert on some iPhone models. In the event that you are getting an alarm on your iPhone about the genuine battery message and considering what it is, this guide is for you.

For what reason is Genuine/Important Message Alert Appearing on Your iPhone?

Apple has always been outstandingly worried about involving excellent parts in its gadgets. It’s a well-known fact that the Cupertino-based organization needs to have unlimited oversight of its gadgets, which practically rules out an autonomous fix. While this conduct can undoubtedly be alluded to as the work of art "Money Digging" strategy with which Apple is broadly related, we have consistently appreciated the tech goliath for going to additional lengths to keep clients from succumbing to non-genuine parts.

For this situation, in any case, Apple has chosen to show this message if the battery isn't changed by an approved Apple Service Center, and regardless of whether the battery is an authentic OEM battery of a similar quality as the one Apple uses. Forget OEM battery, assuming that you take 2 brand-new iPhone XR, for instance, and trade the batteries of the 2 devices on your own, you will begin receiving this message on BOTH the gadgets. The message isn't a sign on the nature of the battery or the sort. If essentially shows that the serial number of the replaced battery doesn't match the serial number put away in the settings of the gadget. At the point when an Authorized Service Center places in another battery, they utilize a unique programming to adjust the new serial number with the goal that your iPhone begins perceiving this substitution battery similar to possess. Since this product isn't accessible with any other individual but Apple, this message is something one needs to live with, at whatever point the battery is supplanted in specific models of iPhone.

On which iPhones does the Important Battery Alert Appear?

The genuine battery alert shows up on iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, 11 Pro, 11 Pro Max, iPhone SE 2, iPhone 12, 12 Mini, 12 Pro, 12 Pro Max, 13, iPhone 13, 13 Mini, 13 Pro and 13 Pro Max. To be more exact, the battery health appears just on the 2018 iPhone models and higher ones.

The alert reads, "U Unable to verify this iPhone has a genuine Apple battery. Health information not available for this battery."

You may also see an extra message expressing that "Apple has updated the device information for this iPhone." It implies that the tech goliath has refreshed the gadget data for your iPhone for security investigation and service needs.

How Long does the Alert Exist on Your iPhone?

When Apple discovers the utilization of non-genuine battery parts on your iPhone, it appears the important battery message right on the lock screen as a clear warning. The message stays on the lock screen for the first 4 days and in the Settings for 15 days.

From that point forward, you can go to Settings > Battery > Battery Health to check the battery alert.

Does This Message Affect Your Ability to Use the iPhone?

No. Apple clearly expresses that the "Important Battery Message" doesn't influence your capacity to use your iPhone. As referenced over, the alert is simply to illuminate you that the replaced battery isn't perceived by the iPhone. It makes little difference to the performance of the battery. The sole disadvantage is that the battery health isn't visible in the Settings straightforwardly but can be checked by means of 3rd party Apps and software.