Astrum ABT-HP4321 Battery for HP & Compaq 420/425/620/625 – 10.8 V 4400 mAh (6-Cell Li-Ion)

SKU: ABT-HP4321 | Warranty: 12 months | Condition: Brand New

Extend your laptop’s unplugged runtime with the Astrum ABT-HP4321. Engineered for HP 420/425/620/625 and a wide range of Compaq and ProBook models, it delivers reliable power, exact OEM fit, and advanced safety features.

🌟 Key Benefits
Extended Runtime: 4400 mAh capacity at 10.8 V for hours of productivity
OEM-Perfect Fit: Custom-molded casing for HP 420/425/620/625, Compaq 320–421, ProBook 4320–4525 series, and more
Advanced Safety: Built-in overcharge, over-discharge, and short-circuit protection
Long Cycle Life: Maintains performance over 500+ charge/discharge cycles
Tool-Free Installation: Easy drop-in replacement—no special tools required
12-Month Warranty: Backed by Astrum’s quality support

📋 Technical Specifications
Specification Details
Battery Type Lithium-Ion (Li-Ion)
Voltage 10.8 V
Capacity 4400 mAh
Cell Count 6-Cell
Operating Temp. 0 °C to 60 °C (32 °F to 140 °F)
Storage Temp. –20 °C to 45 °C (–4 °F to 113 °F)
Protections Overcharge, Over-discharge, Short-circuit
Certifications CE, RoHS

🔑 Compatible Part Numbers
587706-xxx series: 121, 131, 221, 241, 251, 421, 541, 741, 751, 761
592909-xxx series: 221, 241, 421, 721, 741

Others:

593572-001
593573-001
6BJXK01RWZBKDG
BQ350AA, BQ350AAABA, BQ350AAAC3
ABT-HP4321
HSTNN series:
CB1A, CB1B, CBOX
DB1A, DB1B
I85C, I85C-3, I85C-4, I85C-5
I86C, I86C-3, I86C-4, I86C-5
IB1A, LB1A
Q78C, Q78C-3, Q78C-4
Q81C, Q81C-3, Q81C-4
UB1A
W79C-5, W80C
XB1A, XB1B

PH series: PH06, PH06047, PH06047-CL, PH09, PH09093, PH09093-CL

💻 Compatible Models
HP Notebook Series: 420, 425, 620, 625

Compaq Notebook Series: 320, 321, 325, 326, 420, 421, 425, 621

HP ProBook Series:

4320, 4320 s, 4320 t
4321, 4321 s
4325 s, 4326 s
4420 s, 4421 s, 4425 s
4520 s, 4525 s

🛠 Installation & Care Tips
Power off your laptop and disconnect the AC adapter.
Slide the battery release latch and remove the old battery.
Align contacts and insert the Astrum ABT-HP4321 until it clicks.
Fully charge before first use to calibrate the gauge.

To maximize lifespan, avoid extreme temperatures and perform a full charge/discharge cycle monthly.

📦 What’s Included
1 × Astrum ABT-HP4321 10.8 V / 4400 mAh (6-Cell) Battery
1 × Quick-Start Guide with Safety & Installation Instructions