About this replacement
Samsung Watch 282223 — 3.8V Li-Polymer Replacement Battery (P0986)
This is a 3.8V, 200mAh lithium-polymer cell for the Samsung Watch 282223 and Watch 462223. It replaces OEM part numbers P0986 and 462223 when the original cell has degraded or failed entirely. The slim 25.50 × 21.80 × 4.70 mm profile matches the original cell footprint directly.
- Watch 282223 / 462223 fit: Both model variants share the same battery bay dimensions, connector orientation, and fuel gauge IC handshake protocol — one cell covers both.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a Samsung Watch platform. The BMS accepted the new cell without fault codes, and the fuel gauge IC re-calibrated correctly after a full charge cycle from near-zero.
- Post-swap charge sequence on Samsung Watch: After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before use. The fuel gauge IC on this platform cannot set an accurate reference point without one full charge cycle from near-zero following a cell swap — skipping this causes persistent 0% or erratic percentage readings.
Why the Samsung Watch 282223 reports wrong battery percentage after a cell swap
The Watch 282223 uses a coulomb-counting fuel gauge IC that stores its reference data in the original cell's charge history. When you remove the old cell, that reference is lost. The IC then estimates state-of-charge against a blank baseline, producing wildly inaccurate readings — often stuck at 0% or jumping between values. One full charge cycle from near-zero resets the IC and restores accurate reporting.
Magnetic charger not making contact after battery reassembly
If the watch sits on the charger but shows no charging indicator, the charge contacts have likely shifted during back-cover reassembly. The magnetic pogo-pin alignment on the 282223 is tight — even a half-millimetre shift prevents electrical contact. Remove the back cover, reseat the new cell flat against the bay floor, and reclose the cover with even pressure on all four edges. Then place the watch on the charger and confirm the charging icon appears within 10 seconds.