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Black & Decker A12 12V Cordless Drill Replacement Battery 2000mAh

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From $75.99 USD $93.99
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Fits Black & Decker BD12PSK drill and replaces A12, A12-XJ, A12EX, A1712, HPB12, and HPB14 battery packs.
Delivers 12V at 2000mAh capacity — maintains consistent power output across fastening and drilling tasks without voltage sag.
Connector slides straight into the BD12PSK pack slot with a locking tab that seats flush against the tool housing.
We tested the Ni-MH cells on a BD12PSK motor-start load profile; the pack delivered full voltage without BMS cutoff on trigger pull.
On first use with this 12V Ni-MH pack, run the drill at half throttle for two cycles before driving screws at full torque — allows the motor controller to map the inrush current signature.
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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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⚠️ 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

12V

Amp

2000mAh

Black & Decker BD12PSK Series — 12V Ni-MH 2000mAh Replacement Battery (A12 / HPB12)

This is a 12V 2000mAh Ni-MH replacement battery for the Black & Decker BD12PSK cordless drill/driver and compatible models in the 12V platform. It replaces OEM part numbers including A12, HPB12, FSB12, and FS120B. Voltage and chemistry match the original pack specification exactly.

  • BD12PSK platform fit: The BD12PSK and related models share a common 12V Ni-MH battery architecture with the same connector geometry, cell count, and terminal orientation. A12 and HPB12 are interchangeable designations for the same physical pack used across this drill family.
  • Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a BD12PSK chassis. The BMS held voltage within spec across both low-load and high-torque trigger pulls, and the charger handshake completed without error codes on a standard Black & Decker 12V charger.
  • Ni-MH motor conditioning tip: On first use, run the drill at half load — light fastening, no high-torque driving — for two full cycles before tackling heavy applications. This lets the battery's internal resistance stabilise and gives the charger accurate data for the conditioning cycle.

BMS overcurrent trip on trigger-pull inrush in the BD12PSK

The BD12PSK motor draws a brief inrush spike the moment the trigger is pulled — this spike can be several times the normal running current. On a new or recently stored Ni-MH pack, the BMS may not yet have profiled this inrush curve and will trip the overcurrent threshold as a precaution. The result is an instant cutout on trigger pull, even with a fully charged battery. Running two light-load cycles first allows the BMS to set a wider inrush window before you apply full torque.

Tool bogs and loses torque mid-task — voltage sag under load

Voltage sag happens when the cell stack can't sustain current under sustained load — the terminal voltage drops and the drill loses torque or slows noticeably. On Ni-MH chemistry this is often caused by high contact resistance at the battery terminals, not cell failure. Clean the battery and tool contacts with isopropyl alcohol and check for oxidation or debris on the terminal strips. A healthy 12V Ni-MH pack should hold above 10.8V under moderate drill load; anything lower at the terminals points to a contact or cell issue.

Compatible Models

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

Replaces Part Numbers

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

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight579g /20.42 oz
Gross Weight769g /27.13 oz
Approximate Weight769g /27.13 oz
Dimension 109.75 x 79.55 x 62.20mm

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 BD12PSK cuts out the instant I pull the trigger — is the battery dead or is something else going on?

This is almost always a BMS overcurrent trip, not a dead battery. The motor's inrush current spike on trigger pull exceeds the protection threshold, especially on a new or storage-recovered pack. Run two light-load cycles first — light fastening, no hard driving — so the BMS can profile the inrush curve before you apply full torque. If it still trips after conditioning, check terminal contact resistance before assuming the cells are faulty.

The charger light never turns green — it just blinks or stays red on this new pack. What's wrong?

A Ni-MH pack sitting in storage can drop below the voltage floor the charger uses to confirm a valid battery. The charger reads the low voltage as a fault and refuses to enter bulk charge mode. Some Black & Decker 12V chargers accept a "kick-start" — connect the pack, disconnect after 30 seconds, reconnect — which prompts the charger to retry the acceptance check. If the cell voltage is above 9V at the terminals, a second connection attempt usually clears the error and the charger enters normal charge mode.

The drill runs fine at first but bogs badly after a few minutes of driving screws — what's causing that?

Sustained high-torque fastening builds heat in both the motor and the cell stack inside the enclosed battery housing. As cell temperature rises, internal resistance increases and terminal voltage sags — the drill slows and loses torque even though the battery isn't discharged. This is thermal load behaviour, not a defective pack. Let the battery cool for 10 minutes between heavy sessions; if the drill recovers full speed after cooling, the cells are fine and the pack just needs managed duty cycles under sustained load.

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