Black & Decker LB20 18V Replacement Battery 2000mAh Li-Ion
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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Black & Decker LB20 18V Replacement Battery 2000mAh Li-Ion - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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.
Disclaimer
Disclaimer
⚠️ 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.
Black & Decker LB20 18V Replacement Battery 2000mAh Li-Ion - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
2000mAh
Black & Decker ASD18 Series — 18V Li-ion Replacement Battery (LB20 / LBXR20)
This is an 18V 2000mAh Li-ion battery compatible with the Black & Decker ASD18 Typ 1, ASD18 Typ 2, ASD184 Typ 1, ASD184 Typ 2, and over 88 additional Black & Decker 18V platform tools. It replaces OEM part numbers LB20, LBX20, LBXR20, LBXR20B, LBXR2020, LB2X4020, and LBXR20-OPE. Slides into the same slide-pack bay and communicates with the same BMS handshake as the original.
- Black & Decker 18V slide-pack platform: Every model in this compatibility list uses the same 18V slide-pack rail, three-contact BMS interface, and cell configuration. That shared architecture means one battery runs across drills, drivers, and handheld vacuums without an adapter or wiring change.
- Bench tested on actual hardware: We cycled this pack on an ASD18 drill through repeated trigger pulls under fastening load. The BMS handled inrush current on start-up without tripping, held the voltage rail above 16V under sustained torque, and accepted charge from an original Black & Decker 18V charger without error codes.
- Motor inrush break-in on first use: Run the drill at half-load — light fastening, no driving into hardwood — for the first two charge cycles. This lets the BMS log actual inrush spikes from your specific motor before it locks overcurrent thresholds. Skipping this step on a worn motor can trigger nuisance cutoffs.
BMS cutoff on ASD18 motor-start inrush surge
When you pull the trigger on a cordless drill, the motor draws three to five times its running current for a fraction of a second. The BMS in an 18V Li-ion pack monitors this spike and cuts output if it reads above the overcurrent threshold. A new or recently stored pack may have a conservatively set threshold until it has seen a few real load cycles. If the drill cuts out on trigger pull rather than under sustained load, the fix is two to three light-duty break-in cycles — not a charger or tool fault.
Charger won't recognise the pack after storage
Most Black & Decker 18V chargers will not begin a charge cycle if the pack's resting voltage is below approximately 13V. A battery stored discharged for months can drop below this threshold and the charger simply blinks red or shows no activity. The fix is a brief recovery charge — some chargers have a reconditioning mode; if yours does not, a compatible charger with a wake or "force charge" function at a low rate (0.1C) for 15–20 minutes will bring the cells back above the acceptance voltage. Once the pack reads above 13V, the standard charge cycle will start normally.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Black & Decker
- 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 ASD18 cuts out instantly when I pull the trigger — is the battery faulty?
That's a BMS overcurrent trip, not a dead cell. The motor-start inrush current spike exceeds the BMS protection threshold, which is common on a new pack or one that's been sitting uncharged. Run two light-duty cycles — driving short screws, no hardwood — before any heavy fastening work. After that, the BMS recalibrates its overcurrent threshold to your motor's actual inrush profile and the cutouts stop.
The drill feels weak and bogs down mid-screw even with a fresh charge — what's causing that?
That's voltage sag under load, usually caused by high contact resistance at the slide-pack rail. Pull the battery, inspect the three contact pins on both the pack and tool for oxidation or debris, and clean them with a dry cloth or fine emery paper. Reinsert firmly — the rail should click and seat flush. If sag continues after cleaning, check the resting voltage with a multimeter; a healthy 18V pack should read between 19.5V and 20V fully charged.
My ASD18 battery charges fine indoors but loses power fast in cold weather — is something wrong with the pack?
Nothing is wrong — Li-ion internal resistance rises sharply below 5°C, which reduces the current the cells can deliver without the voltage rail collapsing. Store and charge the pack at room temperature, then take it outside once it's at a full charge and warm. If you're working in sustained cold below 5°C, keep a second pack inside rotating so there's always a warm one ready.
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