About this replacement
HTC Desire 210 / D210h — 3.7V Li-Polymer Replacement Battery (B0PD2100)
This is a 3.7V, 1450mAh Li-Polymer cell that replaces the original B0PD2100 battery in the HTC Desire 210, Desire 210 Dual SIM, and D210h. It restores power to a phone that no longer holds a charge or fails to turn on. Dimensions are 55.20 × 45.74 × 4.80mm — same footprint as the factory cell.
- Desire 210 / D210h platform fit: The Desire 210, Desire 210 Dual SIM, and D210h share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell SKU covers all three variants without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the Desire 210 hardware. The BMS accepted the cell without fault flags, charge termination triggered correctly at 4.2V, and the protection circuit tripped as expected on simulated over-discharge.
- Fuel gauge recalibration on first use: After fitting this cell, disable any fast-charge mode and run one full discharge-to-charge cycle. This lets the phone's fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated reference.
Sudden shutdown at 20–30% on the Desire 210 after a cell swap
This is a voltage cliff issue, not a capacity defect. When the modem transmits or the screen backlight peaks, current draw spikes sharply. A new cell with an uncalibrated fuel gauge IC can show 25% remaining while the actual cell voltage drops below the BMS cutoff threshold under that load. The BMS reads the voltage sag as a fault and shuts the device down. One complete discharge cycle — draining to auto-off, then charging uninterrupted to 100% — recalibrates the coulomb counter and eliminates most of these premature shutdowns.
Percentage jumping erratically in the first two days after replacement
The Desire 210's fuel gauge IC stores a learned discharge curve from the old cell in non-volatile memory. When a new cell goes in, the stored curve no longer matches the physical cell's behaviour, so the reported percentage jumps as the IC tries to reconcile the two. This is not a defective battery. Run two full discharge-charge cycles without interruption and the IC overwrites the old curve with data from the new cell. After that, percentage readings stabilise to within a few percent of actual charge state.