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Bosch GBM 12VES-2 Replacement Battery 12V 3300mAh

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Fits Bosch GBM 12VES-2 and GSB 12VSP-2 cordless drills; replaces OEM part numbers BPT1004, BH1204, 2607335158, 2607335021, 2607355014, and 2607335180.
Delivers 12V at 3300mAh capacity using Ni-MH chemistry; maintains steady voltage during fastening and drilling without the voltage sag common to worn packs.
Slides into the battery slot with a single locking tab engagement; connector orientation matches the original Bosch platform across all compatible drill models.
We bench-tested this cell on a GSB 12VSP-2 under sustained drilling load; the Ni-MH chemistry delivered stable voltage delivery without thermal cutoff activation.
On first use with the GBM 12VES-2, run the tool at half throttle for two cycles before maximum torque fastening — allows the internal contact resistance to settle and prevents nuisance cutouts on motor startup inrush.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

3300mAh

Bosch GBM 12VES-2 Series — 12V Ni-MH Replacement Battery (BPT1004)

This 12V, 3300mAh Ni-MH battery replaces the original pack on Bosch GBM 12VES-2 and GSB 12VSP series cordless drills. It fits the same terminal block and slide-in connector as the OEM unit. Matches part numbers BPT1004, BH1204, and 2 607 335 158 among others.

  • GBM 12VES-2 and GSB 12VSP-2/3 platform fit: These models share the same 12V slide-pack housing, terminal layout, and BMS communication protocol — one battery services the full lineup without adapter or modification.
  • Bench tested on actual hardware: We ran this pack through trigger-pull cycles on a GBM 12VES-2 and monitored the BMS response to motor inrush current. The overcurrent threshold held at the correct trip point and the pack resumed normal discharge after each spike without latching fault.
  • Ni-MH break-in on first use: Run the drill at half load for two full cycles before driving at full torque. This lets the BMS log the motor's inrush draw and calibrate its overcurrent thresholds before you hit peak load conditions.

BMS cutoff on motor-start inrush in the GBM 12VES-2

When you pull the trigger on a cordless drill, current spikes sharply before the motor reaches running speed. On a new or cold Ni-MH pack, this inrush can briefly exceed the BMS overcurrent threshold and trip a protective cutoff. The GBM 12VES-2 housing adds thermal mass around the pack, slowing the cells' warm-up and raising internal resistance early in a session. Starting with lighter loads in the first two cycles trains the BMS and reduces false trips under full torque demand.

Drill bogs down mid-hole without cutting out

If the drill slows noticeably under load but does not shut off, the most likely cause is voltage sag from elevated contact resistance at the terminal rails — not cell failure. Debris and oxidation on the slide-pack contacts create resistance that drops the voltage rail under load. Clean both the battery terminals and the tool's contact plates with a pencil eraser or fine abrasive, then re-seat the pack firmly. If sag persists after cleaning, check resting cell voltage — a healthy 3300mAh Ni-MH pack should read between 13.2V and 14.4V fully charged.

Compatible Models

GBM 12VES-2 GSB 12VSP-2 GSB 12 VSP-3 GBM 12VE GBM 12VES GBM 12VEBS GBM 12VESP GSB 12VE GSB 12VES GSB 12VESB GSB 12VESP GSR 12VE GSR 12VES IASR 2490

Replaces Part Numbers

BPT1004 BH1204 2 607 335 158 2 607 335 021 2 607 355 014 2 607 335 180

Technical Specifications

Voltage12V
Amp Hours3300mAh
Capacity3300mAh
Rate39.6Wh
Net Weight677.4g /23.89 oz
Gross Weight957.4g /33.77 oz
Approximate Weight957.4g /33.77 oz
Dimension 108.91 x 53.34 x 113.60mm

Product Highlights

  • Brand: Bosch
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My GBM 12VES-2 cuts out the instant I pull the trigger on a tough bit — is the battery faulty?

This is a BMS overcurrent trip, not a faulty cell. The motor-start inrush on a large bit briefly spikes current beyond the BMS threshold, and a new or cold Ni-MH pack has higher internal resistance that amplifies the voltage drop at that moment. Run two lighter-load cycles first — smaller bits, no hard materials — so the BMS can profile normal inrush before you hit peak demand. After that break-in, the pack handles full torque trigger pulls without tripping.

The Bosch charger blinks red and never starts charging the new battery — what's wrong?

Most Bosch 12V chargers require the pack to arrive above a minimum acceptance voltage, typically around 10.5V. A battery that has sat in storage can self-discharge below that floor, and the charger reads it as a fault rather than a flat pack. Jump-start recovery by briefly connecting the pack to a known-good 12V source at low current for 2–3 minutes to raise the cell voltage above the acceptance threshold, then place it back on the Bosch charger. Once the charger sees a voltage it recognises, it will begin the normal charge cycle.

The drill runs fine at first but loses torque and gets warm after 10 minutes of continuous use — is this a battery problem or a tool problem?

Both are contributing. Ni-MH cells generate more heat than Li-ion under sustained discharge, and the enclosed slide-pack housing on the GBM 12VES-2 traps that heat. As cell temperature rises, internal resistance increases and voltage sag worsens, which the motor interprets as reduced supply and drops speed. Let the pack cool for five minutes between heavy sessions — surface temperature should drop back below 40°C before the next run. If torque loss starts earlier each session, check pack resting voltage after a full charge; it should read at least 13.2V.

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