Vertical SBX IP 320 Replacement Battery 2.4V 850mAh

Vertical SBX IP 320 / V10000 — 2.4V Ni-MH Replacement Battery

This is a 2.4V, 850mAh Ni-MH replacement battery for the Vertical SBX IP 320 and V10000 cordless handsets. It slots directly into the handset battery compartment and restores wireless operation when the original pack can no longer hold a usable charge. Voltage and cell chemistry match the factory specification.

• SBX IP 320 and V10000 compatibility: Both handsets run the same 2.4V Ni-MH cell configuration with identical connector geometry and compartment dimensions (54.30 × 21.43 × 11.19mm). The base station charges at a voltage rail tuned for Ni-MH — swapping to a different chemistry would cause charge errors or overheating.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a Ni-MH-compatible test rig. The cell voltage held within the expected 2.4V window throughout, and the base station accepted the battery without triggering a charge fault.
• First-charge protocol for Ni-MH handsets: After installing, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells shipped in partial-discharge state need a slow, uninterrupted first charge to reach rated 850mAh capacity — skipping this step means the first few cycles will feel short.

Talk time shorter than the original battery after replacement

Ni-MH cells don't deliver full rated capacity straight out of the box. For the first three to five charge cycles, the usable capacity sits noticeably below 850mAh while the cells condition. Each full charge-and-deplete cycle pushes capacity closer to the rated figure. If talk time is still short after five full cycles, check that the handset is fully seated in the base — a partial contact means the pack is only trickle-charged to around 2.2V rather than a full 2.4V.

Base station shows no charge or error light after installing new battery

A Ni-MH pack that has sat in storage at low voltage can fall below the threshold the SBX IP 320 base needs to detect a valid battery — typically around 2.0V. The base interprets anything below that as a fault or missing battery and refuses to start a charge cycle. Leave the handset seated for 30–60 minutes anyway; some base stations will push a trickle current that nudges the pack above the acceptance threshold. If the error clears and charging begins, run two full cycles before checking talk time. If the base still shows no charge after an hour, check the contact pins on both the handset and base for oxidation and clean with a dry cloth.