Black & Decker BL1114 14.4V Cordless Drill Replacement Battery

Description:

Black & Decker ASL146BT12A Series 14.4V Li-ion Replacement Battery (BL1114)

This is a 14.4V, 1500mAh Li-ion battery that replaces the OEM BL1114, BL1314, BL1514, and LB16 packs. It fits the Black & Decker ASL146BT12A and related cordless drill/driver models in the 14.4V platform. Same connector footprint and BMS handshake as the original pack.

• ASL146 platform compatibility: The ASL146BT12A, ASL146K, ASL146KB, and ASL148K all run the same 14.4V rail with the same slide-on connector and cell configuration. One battery SKU covers all of them because the BMS communication protocol and terminal layout are identical across the series.
• Bench tested on actual hardware: We cycled this pack on an ASL146K drill/driver, monitoring cell voltage under load and BMS response. The protection circuit held cutoff thresholds consistent with OEM spec no false trips during repeated trigger pulls.
• Motor inrush break-in on first use: On first use, run the drill at half load for two cycles before applying full torque. This lets the BMS log the motor's inrush current signature and set overcurrent thresholds accurately preventing nuisance cutoffs during heavy fastening later.

BMS cutoff on motor-start inrush surge in 14.4V drill/drivers

When you pull the trigger on a drill/driver, the motor draws a sharp inrush current often three to five times the running load before the rotor spins up. A new or freshly charged battery with a conservative BMS can interpret that spike as a fault and cut output instantly. The protection circuit needs at least one or two cycles to distinguish normal inrush from a genuine short-circuit event. If the drill cuts out the moment you pull the trigger, that is the BMS tripping, not a defective cell.

Tool bogs under load and feels weaker than the old battery

Voltage sag under load is the usual cause the rail voltage drops enough mid-drill that the motor loses torque before the BMS hits its cutoff floor. First, check the slide contact rails on the battery and tool for debris or oxidation; high contact resistance amplifies sag significantly. If contacts are clean and sag persists, verify the pack resting voltage after a full charge is at or above 16.0V. A pack sitting below 15.5V fully charged has a cell imbalance that a standard charger will not correct on its own.