Lion compatible laptop battery for Lenovo thinkpad 42T4901 42T4902 42Y4864 compatible laptop battery
Battery Ratings : Li-Ion, 11.1v 4000mAh,
Compatible battery part numbers (P/Ns) :
0A36281 0A36282 0A36283 42T4861 42T4862 42T4863 42T4865 42T4866 42T4867 42T4875 42T4876 42T4901 42T4902 42Y4864
Kindly match carefully battery image, battery part number (P/N) and laptop model, before purchase.
Supports the following laptop Models :
Lenovo ThinkPad X220 Series ThinkPad X220i Series ThinkPad X220s Series
Battery buying Tips, Kindly read carefully :
1. The new laptop batteries are not fully per charged, you have to charge them in your laptop before you expect some or full backup from a new battery.
2. When a laptop is not working, some buyers assume that the battery replacement is required. Please be aware that the laptop works well directly through ac adaptor even if the battery is not installed. If this is not the case, please do not directly buy the battery unless your laptop works well with ac adaptor.
3. If your old battery is totally dead IE if the laptop gives zero backup with your old battery then, there may be two possibilities :
(a) The old battery is dead and laptop is OK. In this case, only replacing the battery with new one, will solve the problem. For this, just install the new battery into laptop and allow 3-4 hours to get it fully charged. During this time, you may keep working on your laptop.
(b) Old battery is dead and the battery charging circuit inside laptop motherboard, is also dead. In this case, the new battery can be utilized only after you get the laptop motherboard repaired from any expert technician.
If you have any similar laptop battery near you for checking, you may try using that battery to check if laptop charging circuit is able to charge any battery and if that battery gives some backup time even if it is 4-5 minutes.
Please be informed that laptop batteries should not be allowed to remain fully discharged for long time. If allowed, they becomes dead and unusable.
I hope the information given above, will help you reach proper buying decision.