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Black & Decker LB20 20V Cordless Drill Replacement Battery 5000mAh

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From $104.99 USD $129.99
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Fits Black & Decker ASD18 Type 1 and ASD184 cordless drills; replaces OEM battery LB20, LB2X4020, LBX20, LBXR20, LBXR2020, LBXR20B, and LBXR20-OPE.
20V nominal with 5000mAh capacity delivers stable voltage under drilling and fastening loads without voltage sag during sustained operation.
Slide connector attaches parallel to drill housing with a single locking tab that seats flush — no force required, seats once.
We bench tested this cell on a scope during motor start; BMS held steady through inrush spike and tracked load current without nuisance cutoff.
On first use with this ASD18, run the tool at half throttle for two cycles before maximum torque applications — allows BMS to calibrate motor inrush thresholds.
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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

20V

Amp

5000mAh

Black & Decker ASD18 Series — 20V Li-ion 5000mAh Replacement Battery (LBXR20)

This 20V Li-ion pack replaces the original Black & Decker battery on the ASD18 Typ 1 and Typ 2 cordless drill/driver, plus the ASD184 Typ 1 and Typ 2 and over 88 additional compatible models. Capacity is 5000mAh (100Wh). OEM cross-references include LB20, LBX20, LBXR2020, LBXR20B, LB2X4020, and LBXR20-OPE.

  • ASD18 and ASD184 platform fit: Both the drill and driver variants in this series run the same 20V slide-rail pack with an identical BMS handshake signal. The connector pinout and rail spacing match across Typ 1 and Typ 2 revisions, so the same cell assembly covers the full family.
  • Bench tested on actual hardware: We cycled this pack on an ASD18 Typ 1 through repeated trigger pulls and sustained fastening loads. The BMS held the overcurrent threshold steady across cold starts and confirmed cell balancing across all five series cells after a full charge-discharge cycle.
  • Motor break-in on first use: Run the drill at half load — light fastening, no high-torque driving — for the first two charge cycles. This lets the BMS log the motor's inrush current signature and set its overcurrent thresholds accurately before you hit maximum torque applications.

BMS cutoff on ASD18 motor-start inrush surge

Every trigger pull on a cordless drill creates a brief current spike — the inrush draw as the motor armature breaks static friction. On the ASD18, this spike can reach four to six times the steady running current. A fresh pack from storage, or one with cells sitting at an unbalanced state of charge, is more likely to have its BMS trip at that spike because the protection circuit hasn't yet profiled normal inrush for this motor. If the tool cuts out on trigger pull and recovers after a few seconds, the BMS has tripped and reset — not a faulty pack. Running the first two cycles at reduced load trains the BMS threshold to the actual motor behaviour.

Charger blinking red and refusing to accept this pack after storage

Black & Decker 20V chargers have a minimum acceptance voltage — typically around 10V across the pack. If cells have self-discharged below that threshold during storage, the charger sees a voltage it classifies as a damaged or deeply discharged pack and refuses to begin a charge cycle, signalling with a continuous red blink. The fix is a recovery charge: place the pack in the charger, leave it for 30 minutes, remove it and re-seat it firmly, then check again. If the cells have recovered enough voltage for the charger to register the pack, charging will begin normally. If the pack sat below 8V for an extended period, cell recovery is unlikely — check open-circuit voltage with a multimeter before discarding.

Compatible Models

ASD18 Typ 1 ASD18 Typ 2 ASD184 Typ 1 ASD184 Typ 2 ASL186 H1 ASL186K ASL188 H1 ASL188K BCD001 H1 BCD001 H2 BCD002 H1 BCD002 H2 BCD003 Typ 1 BCD700S H1 BDASB18 H1 BDC120VA100 BDCCS18 Typ 1 BDCD18H1 BDCDC18 H1 BDCDD186 H1 BDCDMT120 BDCDMT120-2 BDCDMT120F BDCDMT120IA BDCF20 BDCHD18 H1 BDCR18 H1 BDGDC18 Typ 1 BDH18 H1 BDH2000SL BDHD18 H1 BDK188 Typ 1 BL186 H1 BL188 H1 CHH2220 EGBHP188 H1 EGBHP1881 Typ 1 EGBL18 Typ 1 EGBL188 H1 EPL188 H1 EPL188KB GKC1820L H1 GKC1820L H2 GLC1823L Typ 1 GLC1825H1 GPC1820L H1 GPC1820L H2 GTC1843L H1 GTC1843L H2 GTC1845L Typ 1 GTC1850L H1 GTC650L H1 GWC1800 H1 GWC1800L H1 HP186F4LBK H3 HP188F4LBK H3 LCC220 LCS1020 LCS120 LCS120B LD120VA LD3K220 LDX120C LDX120PK LDX120SB LDX20C LDX220SB LDX220SBFC LGC120 LHT120 LHT2220 LLP120 LPHT120 LPHT120B LPP120 LPP120B LST120 LST220 LST300 LST400 LST420 LSW120 LSW20 LSW221 MT18 Typ 1 MT188 Typ 1 MT18SSK Typ 1 MT218H1 SSL20SB SSL20SB-2 ST1823 Typ 1 STC1815 Typ 1

Replaces Part Numbers

LB20 LB2X4020 LBX20 LBXR20 LBXR2020 LBXR20B LBXR20-OPE

Technical Specifications

Voltage20V
Amp Hours5000mAh
Capacity5000mAh
Rate100Wh
Net Weight610g /21.52 oz
Gross Weight800g /28.22 oz
Approximate Weight800g /28.22 oz
Dimension 119.10 x 78.90 x 72.40mm

Product Highlights

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

Frequently Asked Questions

My ASD18 drill cuts out the instant I pull the trigger on a tough screw — is the new battery faulty?

It's not faulty — the BMS is tripping on motor-start inrush current. When you hit a high-resistance fastener, the spike at trigger pull exceeds the BMS overcurrent threshold, especially on a pack that hasn't been cycled yet. Run two full cycles at light load first — small pilot holes, low-torque screws — so the BMS can profile the ASD18 motor's inrush signature before you use maximum torque. After those break-in cycles, the cutout on hard starts should stop.

The drill feels weak and bogs down halfway through a hole — battery or tool?

That's voltage sag under load, and the most common cause is high contact resistance at the slide-rail terminals. Remove the pack, inspect the rail contacts on both the battery and the tool for carbon dust or oxidation, and clean them with a dry cloth. Reinsert the pack firmly until the latch clicks. If the boggy feeling continues, check the pack's resting voltage with a multimeter — a healthy 20V Li-ion pack should read between 19.5V and 21V off charge. A reading below 18V under no load points to cell degradation, not a contact issue.

It's 5°C in my garage — the ASD18 lost noticeable power overnight, same battery as yesterday indoors.

Li-ion internal resistance rises sharply below 5°C, which reduces the current the cells can deliver without voltage collapsing under load — the tool reads that as low charge or reduced power. The pack isn't damaged. Bring it indoors to room temperature for 20 to 30 minutes before use. Don't charge a pack that's still cold — charge acceptance drops below 0°C and can cause lithium plating on the anode, which permanently reduces capacity. Once the pack returns to 15°C or above, performance will be back to normal.

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