Laptop Battery for HP Compaq 320 321 325 326 420 421 620 621, HP ProBook 4320s 4321s 4325s 4326s 4420s 4421s 4425s 4520s 4525s HP 420 425 4320t 620 625

Compatible Part Number (Ctrl+F)

HP COMPAQ 

HSTNN-IB1A   HSTNN-CB1A    HSTNN-DB1A    HSTNN-CBOX    HSTNN-LB1A 

HSTNN-Q78C HSTNN-Q78C-3 HSTNN-Q78C-4 

HSTNN-Q81C HSTNN-Q81C-3 HSTNN-Q81C-4 

HSTNN-W79C-5    HSTNN-W79C-7 

HSTNN-W80C 

HSTNN-I86C-3 HSTNN-I86C-4 HSTNN-I86C-5 

HSTNN-I85C-3 HSTNN-I85C-4 HSTNN-I85C-5 

587706-761  587706-761  587706-751  593572-001 BQ350AA 

Compatible Model (Ctrl+F)

COMPAQ 

Compaq 320 Compaq 321 Compaq 325 Compaq 326 

Compaq 420 Compaq 421 

Compaq 620 Compaq 621 

HP 

HP 420 HP 425 HP 4320t HP 620 HP 625 

ProBook 4320s ProBook 4321s ProBook 4325s ProBook 4326s 

ProBook 4420s ProBook 4421s ProBook 4425s 

ProBook 4520s ProBook 4525s ProBook 4720s

Proper Battery Usage

• For first time usage, please charge the battery for 3 to 4 hours before using the laptop - usually it requires 2 to 3 charge/ discharge cycles before the battery achieves maximum capacity.

• Best practice is to unplug the charger when the battery is full. And plug in charger when battery reaches 20% to 30%.

• Usage time depends on how you are using your laptop. eg screen brightness, number of applications running etc. Average time is around 2 to 3 hours of continuous usage.

• Careful not to short-circuit the battery by placing the terminals in contact with other metal objects.