About this replacement
Craftsman 10126 Series — 19.2V Ni-MH Replacement Battery (130279005)
This is a 19.2V 1500mAh Ni-MH replacement battery for Craftsman cordless power tools including the 10126, 11541, 11543, and 11570 platforms. It slots into the same battery bay as the original pack and uses the same contact layout. Capacity is 1500mAh (28.8Wh) — matching the stock specification.
- 19.2V platform compatibility: These Craftsman models share the same 19.2V rail, contact footprint, and BMS handshake protocol — which is why one pack spans the full lineup without modification.
- Bench tested on actual hardware: We ran this pack on a Craftsman 19.2V drill under repeated trigger-pull cycles. The BMS handled motor-start inrush without nuisance tripping, and cell voltage held steady across the discharge curve.
- Break-in load cycling: On first use, run the tool at half load for two cycles before full-torque applications. This lets the BMS sample the motor's inrush current draw and calibrate its overcurrent thresholds before you put the pack under maximum stress.
BMS cutoff on drill motor-start inrush surge
When you pull the trigger on a Craftsman 19.2V drill, the motor draws a short but steep current spike before it reaches operating speed. On a fresh pack or a cold pack, the BMS may read that spike as an overcurrent event and cut output instantly. Ni-MH cells have lower internal resistance than older Ni-Cd packs, but the BMS protection threshold is still tuned conservatively from the factory. If the tool cuts out on trigger pull and recovers after a second, the BMS is tripping on inrush — run two half-load break-in cycles to let it recalibrate its threshold.
Tool bogs under load but doesn't cut out
If the drill feels weak and loses torque under sustained load without fully shutting off, the cause is usually voltage sag from high contact resistance at the battery terminals — not a failing cell. Debris or oxidation on the slide contacts increases resistance, which drops the voltage the tool actually receives. Clean both the pack contacts and the tool's battery bay contacts with isopropyl alcohol and a firm brush. After cleaning, a healthy pack should hold above 17V at the rail under moderate drill load.