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Bostitch BTC400 20V Replacement Battery 1500mAh Li-ion

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From $42.99 USD $52.99
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Fits Bostitch BTC400, BTC401, BTC401LA, and BTC440 cordless drills and drivers with 20V battery slot.
20V 1500mAh lithium-ion cell delivers moderate runtime for light to medium fastening and drilling tasks.
Battery slides into standard Bostitch 20V slot with spring-clip locking tab — connector seats flush.
We bench-tested this pack under sustained drill motor load; BMS held steady until thermal cutoff engaged properly.
On first use with the BTC400, run the tool at half trigger for two cycles before full-torque applications — allows BMS to calibrate motor inrush current thresholds before setting overcurrent protection.
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Battery Care Tips

🔹 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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

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

Voltage

20V

Amp

1500mAh

Bostitch BTC400 Series — 20V Li-ion 1500mAh Replacement Battery

This is a 20V 1500mAh Li-ion replacement battery for Bostitch compact cordless tools. It fits the BTC400, BTC401, BTC401LA, and BTC440 series drills, drivers, and fastening tools. Voltage and connector match the original pack exactly.

  • BTC400 and BTC440 platform fit: These models share the same 20V battery rail, slide-in connector, and BMS handshake protocol. One battery works across the range without adapters or firmware differences.
  • Bench tested on actual hardware: We ran this pack through trigger-pull cycles on a BTC401 driver. The BMS held steady through repeated motor-start inrush spikes and did not trip on normal fastening loads.
  • First-use motor load conditioning: Run the tool at half torque for the first two cycles before pushing maximum load. This lets the BMS profile the motor's inrush current draw and set accurate overcurrent thresholds before heavy fastening work begins.

BMS cutoff on BTC400 motor-start inrush surge

When you pull the trigger on a drill or driver, the motor draws a current spike several times higher than its running load. On a fresh or cold pack, the BMS may read that spike as an overcurrent fault and cut power instantly. This is a protection trip, not a dead battery. To clear it, release the trigger fully, wait three seconds, and re-engage at reduced speed. If trips continue, check the battery rail contacts for oxidation — dirty contacts increase resistance and amplify the voltage drop the BMS sees during inrush.

Charger blinking red on a new 20V pack after storage

Li-ion cells self-discharge slowly in storage. If the pack drops below approximately 2.5V per cell, most chargers refuse to enter full charge mode and signal a fault with a red blink. The fix is a slow pre-charge — place the battery in the charger and leave it for 20–30 minutes without interrupting the cycle. Many chargers will recover the pack once cells climb back above the acceptance threshold of around 2.8V per cell. If the charger still rejects it after 30 minutes, measure pack voltage at the terminals — below 14V on a 20V pack means the cells need longer recovery or have dropped below salvageable range.

Compatible Models

BTC400 BTC401 BTC401LA BTC440 BTC441 BTC441LB

Technical Specifications

Voltage20V
Amp Hours1500mAh
Capacity1500mAh
Rate30Wh
Net Weight342.1g /12.07 oz
Gross Weight522.1g /18.42 oz
Approximate Weight522.1g /18.42 oz
Dimension 119.60 x 76.12 x 51.60mm

Product Highlights

  • Brand: Bostitch
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My BTC401 driver cuts out the instant I pull the trigger — is the battery dead or is it tripping?

That's a BMS overcurrent trip, not a dead cell. The motor-start inrush current spike exceeds the BMS protection threshold, especially on a cold or recently stored pack. Release the trigger fully, wait three seconds, then re-engage at reduced speed to let the BMS reset. If it keeps tripping, clean the battery rail contacts — oxidised contacts raise resistance and make the inrush spike look worse to the BMS than it actually is.

The BTC400 runs fine for the first few fasteners then suddenly feels weak and bogs under load — what's happening?

That's voltage sag under sustained draw, not a capacity problem. As the cells heat up during continuous use, internal resistance rises and the voltage rail drops below what the motor needs to hold torque. Check the slide-in connector on both the battery and the tool for dirt or pitting — high contact resistance makes sag worse. Let the pack cool for five minutes between heavy fastening runs; if the tool recovers full power after cooling, the cells are fine and the issue is thermal, not electrical.

The BTC440 has been sitting unused for six months — now the charger just blinks red and won't charge the battery. What do I do?

The cells have self-discharged below the charger's acceptance voltage, which is typically around 2.8V per cell. Leave the pack in the charger undisturbed for 20–30 minutes — most chargers will attempt a slow recovery charge once they detect a slight voltage rise. Do not pull and reseat the battery during this period, as interrupting the recovery cycle resets the timer. If the charger still blinks red after 30 minutes, measure pack voltage at the terminals — a reading below 14V means the cells need extended recovery; above 14V, the charger itself may be rejecting the pack ID signal.

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