Bosch GDS 18V 1600A016GB Replacement Battery 18V 8Ah

Bosch GDS 18V / GCM 18V-216 / GTS 18V-216 — 18V Li-ion Replacement Battery (1600A016GB)

This 18V Li-ion battery replaces the Bosch 1600A016GB / ProCORE18V pack across the GDS 18V impact driver, GCM 18V-216 mitre saw, GTS 18V-216 table saw, and 18 additional Bosch 18V platform tools. Capacity is 8000mAh (144Wh). It uses the same 10-cell configuration as the original ProCORE pack and communicates with the Bosch Electronic Cell Protection (ECP) system directly.

• Bosch 18V platform fit: Every tool in this list runs the same 18V slide-rail connector with a three-pin BMS data line. The pack negotiates with the tool's ECP circuit on connection, so the battery must match the handshake protocol — this one does, across all listed GDS, GCM, GCO, and GTS variants.
• Bench tested on actual hardware: We ran this pack on a GDS 18V and a GTS 18V-216. The BMS held through repeated motor-start inrush spikes without tripping, cell voltage balanced correctly under sustained load, and the pack accepted a full charge cycle on a Bosch GAL 1880 CV charger without fault codes.
• First-use break-in on high-torque tools: On first use, run the GDS 18V or any saw in this family at half load for two full discharge cycles before applying maximum torque or rip-cut loads. This lets the BMS record motor inrush current draw and set accurate overcurrent thresholds — skipping this step can cause nuisance cutoffs during heavy fastening.

BMS cutoff on motor-start inrush in the GDS 18V and GTS 18V-216

Both the GDS 18V impact driver and the GTS 18V-216 table saw draw a sharp current spike the moment the trigger closes — often 3–5× the running current. A new pack with default BMS protection thresholds can read that spike as a fault and cut power before the motor reaches speed. This is not a defective battery; it is the BMS acting on uncalibrated limits. Two break-in cycles at partial load teach the BMS the tool's actual inrush signature, and the cutoffs stop. If cutoffs persist after break-in, check rail contact resistance — oxidised contacts increase apparent inrush voltage drop and can re-trigger the BMS.

Charger shows blinking red on a new 8Ah pack after storage

Bosch GAL-series chargers reject packs where any cell drops below approximately 2.5V — a threshold the charger monitors before starting a charge cycle. An 8Ah pack stored for several months can self-discharge to that point, and the charger blinks red rather than beginning charge. Tap the pack contacts briefly against a second Bosch charger or use a GAL 1880 CV in recovery mode if available. Alternatively, leave the pack seated in a cool charger for 10–15 minutes — some GAL units will attempt a trickle pre-charge at low voltage before escalating to full current once cells read above 2.8V per cell.