This 10.8V 4400mAh Li-ion battery is a compatible replacement for Compaq 421. Compare the number printed on your current battery, its voltage, chemistry, dimensions and connector before ordering.
Special Order - Non-Cancellable - Non-Returnable - Additional Lead Time May Be Required On This Item.
Included: One replacement battery pack.
Battery specifications
| Voltage | 10.8V |
| Capacity | 4400mAh |
| Chemistry | Li-ion |
| Energy | 47.52Wh |
| Dimensions | 268.20 x 95.00 x 48.00mm |
| Battery weight | 320g /11.29 oz |
Replacing your Compaq 421 battery
Compare the connector shape, wire arrangement and polarity with your original battery. Check all listed specifications; a similar model name or matching voltage alone does not confirm a fit.
Compatible equipment models
HP 420, 425, 620, 625, 4320t, ProBook 4320s, ProBook 4321s, ProBook 4325s, ProBook 4326s, ProBook 4420s, ProBook 4421s, ProBook 4425s, ProBook 4520s, ProBook 4525s, Compaq 320, 321, 325, 326, 420, 421, 620, 621
Replacement battery numbers
HP BQ350AA, 587706-121, 587706-751, 593572-001, HSTNN-CB1A, HSTNN-CB1B, HSTNN-DB1A, HSTNN-IB1A, HSTNN-LB1A, HSTNN-Q78C, HSTNN-Q81C, HSTNN-Q78C-3, HSTNN-Q78C-4, HSTNN-W79C-5, Compaq BQ350AA, 587706-121, 587706-751, 593572-001, HSTNN-CB1A, HSTNN-DB1A, HSTNN-IB1A, HSTNN-LB1A, HSTNN-Q78C, HSTNN-Q81C, HSTNN-Q78C-3, HSTNN-Q78C-4, HSTNN-W79C-5