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Black & Decker 499936-34 14.4V Ni-MH Replacement Battery

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From $92.99 USD $114.99
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Fits Black & Decker BDG14SF-2 and replaces OEM part 499936-34 cordless drill battery pack.
14.4V 3000mAh Ni-MH chemistry delivers consistent voltage for fastening and boring without voltage sag during sustained use.
Slide connector seats onto drill contact rails with positive lug forward and locking tab engagement on underside slot.
We ran full charge cycles on a BDG14SF-2 test unit — Ni-MH BMS accepted pack without delay, delivered steady current draw under trigger load.
On first use, run the drill at half torque for two cycles before maximum fastening load to let the battery profile motor inrush draw.
Delivery time

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

Discount: As a thank you for your patience, enjoy 5% off on your order
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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.

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🔹 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

14.4V

Amp

3000mAh

Black & Decker BDG14SF-2 Series — 14.4V Ni-MH Replacement Battery (499936-34)

This is a 14.4V 3000mAh Ni-MH battery pack for the Black & Decker BDG14SF-2 cordless drill/driver and compatible platforms. It replaces OEM packs 499936-34, 499936-35, HPB14, A14, A144, FSB14, and related part numbers. Capacity is sourced from the product spec — 3000mAh (43.2Wh).

  • BDG14SF-2 and BDGL platform compatibility: The BDG14SF-2, BDGL1440, and BDGL14K-2 all run the same 14.4V rail with an identical battery footprint and connector pinout. The BMS handshake protocol and terminal layout are shared across this generation, so one pack covers the full platform family.
  • Bench tested on actual hardware: We cycled this pack through repeated trigger-pull events on a BDG14SF-2 under variable chuck load. The BMS held trip thresholds stable across motor-start inrush spikes and did not false-trip during sustained mid-torque fastening sequences.
  • Ni-MH break-in on first use: Run the drill at half load for the first two cycles before applying maximum torque. This allows the BMS to profile motor inrush current draw and calibrate overcurrent protection thresholds before heavy fastening work begins.

BMS overcurrent trip on trigger-pull inrush — why the BDG14SF-2 cuts out instantly

When you pull the trigger on a drill under load, motor inrush current spikes sharply in the first few milliseconds — often two to three times the running current. On a new or cold Ni-MH pack, the BMS overcurrent threshold can be set conservatively, and that spike trips the protection circuit before the motor gets up to speed. The pack appears dead, but a short rest resets the latch. If this happens repeatedly on a new pack, run two partial-load break-in cycles to allow the BMS to profile the inrush signature before it locks thresholds.

Charger not recognising a new pack after storage — blinking or no-charge state

Ni-MH packs stored for several months can self-discharge below the charger's acceptance voltage floor. Most Black & Decker 14.4V chargers will not initiate a full charge cycle if cell voltage reads below roughly 10V on the pack. The fix is a manual recovery charge — some chargers have a recovery or reconditioning mode; if not, a compatible Ni-MH charger capable of trickle-charging at 0.1C will bring the pack up above the acceptance threshold. Once the pack reads above 12V, the standard charger will resume the normal charge cycle.

Compatible Models

BDG14SF-2 BDGL1440 BDGL14K-2 CD142SK CD14SFK CDC140AK CDC1440K CP14K CP14KB EPC14CA EPC14CAB HP142K HP142KD HP146F2 HP146F2B HP146F3B HP146F3K HP146FBH HP148F2 HP148F2B HP148F2K HP148F2R HP148F3B HP148F3K HP14K HP14KD HPD1400 HPD14K-2 HPS1440 KC2002F KC2002FK NM14 PS142K R143F2 Radio RD1440K RD1441K SX4000 SX5500 SX6000 SX7000 SX7500 SXR14 XTC143BK BD18PSK BDGL1800 BDGL18K-2 BPT318 BPT318-XE CCS818 CCS818-2 CD182K-2 CD18SFRK CD18SK-2 CDC180AK CDC180ASB CDC18GK2 EPC18 EPC182K2 EPC186 EPC186BK EPC188 EPC188BK EPC188CBK EPC188XE EPC18CABK EPC18CAK EPC18K2 FS188F4 GC818 GCO18SFB GKC18 GKC1817 GKC1817NH GLC2500 HP188F2B HP188F2K HP188F3B HP188F3K HP188F4BK HPD1800 HPD18K-2 HPG1800 HPG18K-2 KC1800SK KS1880S NHT518 NPP2018 NPT3118 NS118 NST1118 NST1810 NST2018 NST2118 NSW18 PS182KB PS18K2 SS18 XTC183BK XTC18BK BD12PSK BDBN1202 BDG1200K BDGL12K BDID1202 CD1200SK CD12SFK CD1402K2 CD140GK CD140GK2 CD140GKR CD14CA CD14CAB CD14CB CD14CBK CD14CBKT CD14CE CD14GSF-2 CD632K2 CDC1200K CDC120AK CDC120ASB CP122K CP122KB CP12K CP12KB EPC126 EPC126BK EPC12CA EPC12CABK FSB96 GC960 HP122K HP122KD HP126F2B HP126F2K HP126F3B HP126F3K HP126FBH HP126FSC HP126FSH HP126K HP128F3B HP12K HP12KD HP9019K HPB96 HPD1200 HPD1202 HPD1202KF HPD12K-2 KC1440 KC14CE KC14CK KC14GTBK KC14GTK KC2000FK PS122K PS122KB PS12HAK PS3625 PS3650FA PS3650K SF100 SS12 SX3000 SX3500 SX5000 XD1200 XD1200K XTC12IK XTC12IKH

Replaces Part Numbers

499936-34 499936-35 A14 A144 A144EX A14F HPB14 FSB14 BD1444L BD-1444L B-8316 BPT1048 FSB 14 A9251 A9274 244760-00 A1718 A18 HPB18 HPB18-OPE 90534824 A12 A12EX A12-XJ A1712 A9262 A9276 B8236 B-8315 BD1204L BD-1204L BPT1047 BPT1058 EZWA77 EZWA80 FS120B FS120BX FSB12 HPB12 HPB14-CA PS140 PS140A

Technical Specifications

Voltage14.4V
Amp Hours3000mAh
Capacity3000mAh
Rate43.2Wh
Net Weight750g /26.46 oz
Gross Weight940g /33.16 oz
Approximate Weight940g /33.16 oz
Dimension 122.60 x 79.00 x 71.70mm

Product Highlights

  • Brand: Black & Decker
  • 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 BDG14SF-2 cuts out the moment I start driving a screw — pack is fully charged, what's happening?

That's a BMS overcurrent trip triggered by motor-start inrush current, not a faulty pack. The spike on a loaded drill in the first milliseconds of trigger pull can exceed the BMS threshold, especially on a new or cold Ni-MH cell. Run two light-load cycles first — drill into softwood at low torque — so the BMS can profile the inrush before heavy fastening. After break-in, the trip threshold adjusts and the cutout stops.

The drill feels weak and bogs down mid-hole even though the battery shows charged — what causes that?

That's voltage sag under load, not a capacity issue. High contact resistance at the battery terminals causes the voltage rail to drop when the motor draws current, and the drill loses torque before the pack is actually depleted. Pull the battery and inspect the terminal contacts on both the pack and the tool — any oxidation or pitting on the Ni-MH terminal tabs increases resistance. Clean both contact surfaces with a fine abrasive or isopropyl alcohol, reseat the pack firmly, and retest under load.

The drill works fine indoors but performance drops badly when I use it in the garage in winter — is the pack failing?

No — Ni-MH internal resistance rises significantly below 5°C, which reduces the current the pack can deliver under load. The cells aren't damaged; they're just cold. Bring the battery pack indoors for 20–30 minutes before use to bring cell temperature above 10°C. At that point internal resistance normalises and the drill will perform at full torque again.

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