Battery for Lenovo ThinkPad T420 Black, t410

Description

When the Lenovo ThinkPad T420 battery bar displays ‘incompatible battery’

Seeing your Lenovo ThinkPad T420 battery bar display ‘not charging’ or ‘incompatible battery’ is hard to take in. But there are easy solutions. The issue might stem from the laptop’s BIOS, which will require a system upgrade to identify and charge the battery. The current configurations of the system may only suit an Original Equipment Manufacturer (OEM) battery. It can prevent your Lenovo replacement battery from communicating properly with your software. You can find a suitable BIOS upgrade from Lenovo official website. Recharge your ThinkPad T420 battery after the upgrade for 12 hours and resume regular usage.

When a fully charged Lenovo ThinkPad T420 battery does not work

There are instances whereby your fully charged battery would not power up your PC. This ‘False Peak’ often happens when a discharged battery for ThinkPad T420 is used for the first time in several months. The charging indicator reveals a fully charged battery within the initial 10 to 15 minutes of charging, whereas the reverse is the case. When this occurs, plug the battery in for an hour or so. Afterward, unplug the battery and immediately plug it in. Normal charging of the Lenovo ThinkPad T420 battery will commence and the battery indicator will light up. You may have to do this several times within this period.

Lenovo ThinkPad T420 Battery charging stops at 95%

Calibrating your Lenovo laptop through the Windows Power Management tool will stop this from happening. Afterward, unplug the laptop’s ac adapter and drain the battery. Plug your Lenovo ThinkPad T420 battery until it is fully charged. You may need to repeat the process until you attain a full charge

When a new ThinkPad T420 battery gets bad

After purchasing a new replacement battery for ThinkPad T420 Lenovo laptop, you may still experience some issues with it. After trying several other troubleshooting steps to no avail, your battery is likely bad. Then, it is up to you to return it to where you bought it. Several reasons might have caused the damage. Transporting and packaging are some of the reasons why your replacement battery could go bad. Still, it is important that you purchase your Lenovo ThinkPad T420 laptop battery from the right source.

Fit Machine Models:

• Lenovo ThinkPad E40
• Lenovo ThinkPad L412
• Lenovo ThinkPad E50
• Lenovo ThinkPad L420
• Lenovo ThinkPad Edge 0578-47B
• Lenovo ThinkPad L421
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad L510
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad L512
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad L520
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad SL410
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad SL410 2842
• Lenovo ThinkPad Edge 14'
• Lenovo ThinkPad SL410 2874
• Lenovo ThinkPad Edge 15'
• Lenovo ThinkPad SL410k 2842
• Lenovo ThinkPad L410
• Lenovo ThinkPad SL510
• Lenovo ThinkPad SL510 2847
• Lenovo ThinkPad SL510 2875
• Lenovo ThinkPad T410
• Lenovo ThinkPad T410i
• Lenovo ThinkPad T420
• Lenovo ThinkPad T510
• Lenovo ThinkPad T510i
• Lenovo ThinkPad T520
• Lenovo ThinkPad W510
• Lenovo ThinkPad W520

Compatible with numbers:

• Lenovo 42T4733
• Lenovo 42T4235
• Lenovo 42T4731
• Lenovo 42T4757
• Lenovo 42T4737
• Lenovo 42T4753
• Lenovo 51J0499
• Lenovo 57Y4185
• Lenovo 57Y4186
• Lenovo ASM 42T4703
• Lenovo ASM 42T4752
• Lenovo ASM 42T4756
• Lenovo ASM 42T4796
• Lenovo FRU 42T4702
• Lenovo FRU 42T4751
• Lenovo FRU 42T4755
• Lenovo FRU 42T4791
• Lenovo FRU 42T4793
• Lenovo FRU 42T4795
• Lenovo FRU 42T4797