About this replacement
Rapoo Ti100 — 3.7V Li-Polymer Replacement Battery (AHB102050PJT)
This is a 3.7V, 900mAh Li-Polymer battery for the Rapoo Ti100 wireless headset. It replaces part number AHB102050PJT directly. Fits the Ti100 only — check your OEM part number before ordering.
- Ti100 cell fit: The Ti100 runs a single-cell Li-Polymer pack at 3.7V nominal. The BMS in the headset monitors cell voltage and current draw across both the audio codec and the Bluetooth radio simultaneously — the replacement cell must match the original voltage profile or the BMS will cut power early.
- Bench tested on actual hardware: We cycled this cell through combined Bluetooth radio and audio load. The BMS accepted the new pack without error, held voltage above 3.4V under sustained draw, and completed a full charge cycle from the base station without a fault flag.
- Base station first charge: Seat the headset in the base station immediately after fitting and leave it for a complete charge cycle before use. The Ti100's talk-time counter reads from the base station's charge log — if the base hasn't completed one full cycle with the new cell, the displayed talk-time estimate will be inaccurate.
Why the Ti100 cuts out mid-call even with a new battery fitted
The Ti100 pulls current from two sources at once — the audio driver and the Bluetooth radio. During an active call, this combined draw briefly spikes above what the BMS expects from a cell at storage voltage. If the new cell hasn't been through a full charge cycle, resting voltage sits around 3.6–3.7V but the BMS still trips on the spike. One complete charge-discharge cycle brings the cell up to full capacity and stabilises the BMS response to those draw spikes.
Base station shows full charge but headset dies after a few minutes
This happens when the cell arrives at storage voltage — typically 3.75–3.80V — and the base station interprets that as a near-full charge, terminating the cycle early. The cell never reaches true full capacity. The fix is to discharge the headset fully with a call or audio playback, then return it to the base for a complete uninterrupted charge. After one proper full cycle, the base station's charge termination logic resets to the correct cutoff point for the new cell.