02K6577 - Li-Ion Batt IBM TPad i1400/1500 series. Compatible Part Numbers: 02K6603, 02K6602, 02K6601, 02K6647 or 02K6648. Supports i Series 1400 models 412, 452, 472 and 1500 series models 512, 552. Please look up the bottom of your computer and find the "TYPE" no. If it starts with 2621-___ or 2651-___ this is the right battery for your laptop. Battery Technology: Li-Ion, 10.8 Volts 5400 mAh