About this replacement
Yoto YM002 / Mini 2024 — 3.8V Li-Polymer Replacement Battery (AHB694449)
This is a 3.8V 1900mAh (7.22Wh) Li-Polymer replacement cell for the Yoto YM002 and Mini 2024 portable speaker. It slots directly into the speaker chassis and restores audio playback to a unit that no longer holds a charge. Capacity figures come from the product data, not from the original cell label.
- YM002 and Mini 2024 compatibility: Both models share the same 46.30 × 42.80 × 6.70mm cell footprint and the same 3.8V nominal rail, so one cell covers both. The BMS on each unit uses the same charge-termination voltage, so the replacement cell negotiates the same charge cycle as the original.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the YM002 platform and confirmed the BMS accepted the cell without fault flags. Charge termination triggered correctly at the upper voltage limit and the protection circuit tripped normally under overcurrent conditions.
- Monthly full-cycle care for the YM002: If the speaker sits on a desk and gets topped off constantly, let it run down below 20% at least once a month before recharging. Constant shallow charging causes fuel gauge drift on this cell chemistry, and the speaker's battery indicator will start misreporting state of charge.
Capacity fade from keeping the Yoto Mini 2024 always plugged in
Li-Polymer cells degrade faster when held at high state of charge for long periods. The Yoto Mini 2024 is often left on a shelf or desk connected to USB, which keeps the cell near full charge continuously. Over months, this accelerates capacity loss in the upper voltage range where the cell spends most of its time. If playtime has dropped noticeably despite a full charge reading, the original cell has likely degraded from this pattern — not from heavy use.
Audio distorting before the Yoto battery indicator reaches empty
As the cell discharges toward its lower voltage limit, the amplifier draws more current to maintain output level. On a degraded or deeply cycled cell, internal resistance rises, causing voltage to sag under amplifier load even when the indicator still shows charge remaining. The result is audible distortion or clipping before the battery icon reads empty. If you hear crackling or compression at moderate volume with charge still showing, check resting voltage — a healthy cell should read above 3.6V at rest after a full charge.