Total Micro - Notebook battery (equivalent to: Lenovo 0A36287) - lithium ion - 6-cell - 3900 mAh - for Lenovo ThinkPad T420s 4170, 4171, 4172, 4173, 4174, 4175, 4176; T420si 4171

Takes lesser time to charge, compared to others Delivers 11.1 V DC to your compatible notebook, ensuring that your device is ready to use when needed 3900 mAh capacity ensures secure power flow to your notebook Rechargeable battery - Lasts longer on a single charge than its disposable counterparts