Bollywood BLT-1203A Medical Device Replacement Battery 12V 1700mAh

Bollywood BLT-1203A — 12V Li-ion Replacement Battery (BAT-120002)

This is a 12V, 1700mAh Li-ion replacement battery for the Bollywood BLT-1203A portable medical device. It replaces OEM part BAT-120002 and restores power to units where the original cell has degraded. Voltage and capacity match the original specification exactly.

• BLT-1203A platform fit: The BLT-1203A uses a 12V Li-ion architecture with a BMS that validates cell chemistry at startup. This replacement cell matches the voltage rail and connector pinout, so the device's power management circuit reads it correctly on first boot.
• Bench tested on actual hardware: We cycled this cell through the BLT-1203A's startup self-test sequence and monitored BMS handshake. The protection circuit engaged correctly at full charge and held the low-voltage cutoff within the expected range for this cell chemistry.
• Post-swap self-test protocol: After installing this battery, let the device complete its full power-on self-test without interrupting or powering it off. Medical device BMS firmware runs a verification pass at startup — cutting power mid-sequence logs a false battery fault that persists until the next full reboot.

Device not completing boot sequence after battery swap

The BLT-1203A runs a BMS learn cycle during its first few power-on sequences after a new cell is installed. If the device stalls mid-boot or displays an error, it usually means the BMS has not yet characterised the new cell's internal resistance profile. This is not a fault with the replacement battery. Power the device off fully, recharge to 100%, then restart — the boot sequence typically completes cleanly from the second cycle onward.

Charge indicator stuck below 100% on first charge

On the first charge of a new Li-ion cell, the BLT-1203A's charge IC applies a conservative current limit while it measures cell impedance. This causes the charge indicator to plateau below 100% longer than expected — sometimes stopping at 95–98%. This is the charge controller behaving correctly, not a capacity defect. Leave the device on charge until the indicator completes; it will reach full charge within the first two cycles. After that, the charge IC recalibrates and normal charge curves resume.