This HP BQ350AA Laptop Battery is also compatible with the following models:
COMPAQ
Compaq 320
Compaq 321
Compaq 325
Compaq 326
Compaq 420
Compaq 421
Compaq 620
Compaq 621
HP
420
421
425
4320t
620
625
ProBook 4320s
ProBook 4321s
ProBook 4325s
ProBook 4326s
ProBook 4420s
ProBook 4421s
ProBook 4425s
ProBook 4520s
ProBook 4525s
ProBook 4720s
Some questions about HP BQ350AA Battery
Q: Is it necessary to activate the new HP BQ350AA batteries?
A: Yes, it is. It generally takes more than 10 hours to activate the newly bought battery each time. And it could be fully activated after repeat 3-5 times.
Q: how to properly charge the HP BQ350AA laptop battery?
A: any time is available. The best time to charge is when the laptop automatically shut down .Each time for charging and discharging is fully developed, which is good to extend the HP battery BQ350AA life.
Q: Is it right to unplug the HP BQ350AA when using the external laptop ac adapter?
A: It is unnecessary to do that. Rechargeable HP BQ350AA has anti-overcharge protection circuit inside. Therefore, when the replacement HP BQ350AA notebook battery is fully charged, it will not be harmed; what is more, once the power were cut off after the battery is removed, it would have bad effect on the laptop itself.
Q: How to properly maintain the HP BQ350AA replacement battery that is not used for a long time?
A: The battery should be kept with full power at room temperature,when not used for a long-term. Because internal components would deplete part of the power, the electricity could reduce when placed for some time. It is recommended to recharged the battery after saving the battery for 1-2 months in order to prevent the voltage being too low to lithium-ion HP BQ350AA not charging.