Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Black & Decker LB20 18V Replacement Battery 5000mAh Li-ion

Up to 19% off
New arrival
From $111.99 USD $137.99
Shipping calculated at checkout.
Fits Black & Decker ASD18 Type 1 drill and 90+ compatible models; replaces OEM part LB20, LB2X4020, LBX20, LBXR20, LBXR20B.
18V lithium-ion pack with 5000mAh capacity delivers full torque on fastening, boring, and light drilling without voltage sag under sustained load.
Slide-lock connector seats flush into the ASD18 battery bay; tab engages on left side when fully inserted and flush with housing.
We tested the pack on motor-start inrush and full-load torque cycles; BMS held steady through trigger-pull spikes and tracked thermal conditions in the enclosed housing.
On first use with this ASD18, run the drill at half throttle for two cycles before maximum torque fastening — lets the BMS profile motor inrush current before locking overcurrent thresholds.
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
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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.

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.

Voltage

18V

Amp

5000mAh

Black & Decker ASD18 Series — 18V Li-ion 5000mAh Replacement Battery (LBXR20)

This is an 18V lithium-ion replacement battery rated at 5000mAh (90Wh), built to the same voltage rail and connector spec as the original Black & Decker LB20 / LBXR20 family. It fits the ASD18 Typ 1, ASD18 Typ 2, ASD184 Typ 1, and ASD184 Typ 2 cordless drill/drivers, along with 88 additional compatible models that share the same 18V slide-in platform. Pull your old pack out, slide this one in — connector orientation and locking tabs are identical.

  • ASD18 platform compatibility: Every model in this fit list runs the same 18V slide-in connector, uses the same BMS handshake voltage thresholds, and draws from the same current rail. That shared architecture is why one cell pack covers the full list without modification.
  • Bench tested on actual hardware: We ran this pack on an ASD18 drill under repeated fastening cycles and tracked BMS response through motor-start inrush. Overcurrent protection triggered correctly at the expected threshold and reset cleanly on each subsequent pull.
  • Break-in load sequence: On first use, run the drill at half load for two cycles before applying maximum torque. This gives the BMS time to profile the motor's inrush current signature and calibrate its overcurrent protection thresholds before you're driving long fasteners into hardwood.

BMS cutoff on motor-start inrush surge in the ASD18

When you pull the trigger on a loaded drill, the motor draws a spike of current — often three to five times the running draw — in the first milliseconds before it reaches operating speed. If the BMS hasn't profiled that motor's inrush signature yet, it can read that spike as a fault and cut power. This is not a defective battery; it's the protection circuit doing its job with incomplete calibration data. Running two half-load cycles before full-torque work lets the BMS log the inrush pattern and set its threshold correctly. After that, trigger-pull cutouts under normal load should stop.

Charger not recognising the pack after storage

If the battery sat unused for several months, cell voltage may have dropped below the charger's acceptance threshold — typically around 2.5V per cell. The charger sees a voltage too low to safely fast-charge and either blinks red or shows no response at all. Most Black & Decker chargers have a recovery mode: leave the pack connected for 30 minutes without removing it. The charger trickle-charges the cells back above the acceptance floor, then switches to normal charge mode. If rail voltage across the pack reads below 14V with a multimeter, that trickle recovery cycle is the correct first step.

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

Voltage18V
Amp Hours5000mAh
Capacity5000mAh
Rate90Wh
Net Weight626g /22.08 oz
Gross Weight816g /28.78 oz
Approximate Weight816g /28.78 oz
Dimension 119.56 x 78.40 x 72.95mm

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 the moment I pull the trigger on a tight screw — is that the battery or the drill?

That's the battery's BMS tripping on motor-start inrush current, not a drill fault. When the motor spins up under load, it pulls a short current spike that can exceed the BMS overcurrent threshold if the pack hasn't been calibrated to that motor yet. Run the drill unloaded or at half load for two full discharge cycles — the BMS will profile the inrush pattern and stop tripping. After that, trigger-pull cutouts under normal fastening loads should not recur.

The drill runs fine for the first few holes, then bogs down and feels weak — what's happening?

That's voltage sag — cell voltage dropping under sustained current draw, which reduces power at the motor. It gets worse if the rail contacts between the battery and tool have oxidation or debris increasing resistance. Clean the slide-in contact rails on both the pack and the drill with a dry cloth, then check that the pack clicks fully home. If sag still occurs after cleaning, check pack surface temperature — cells running above 45°C will throttle output as a thermal protection measure.

The pack was sitting in the shed over winter and the charger just blinks red and won't charge it — how do I recover it?

Cold storage plus self-discharge can drop cell voltage below the charger's minimum acceptance threshold, which triggers the red blink instead of a normal charge cycle. Leave the pack seated on the charger without removing it for 30 minutes — the charger will trickle current into the cells until they climb above the acceptance floor, then switch to normal charge mode automatically. If the pack doesn't transition after 45 minutes, measure voltage across the battery terminals: anything below 12V means cell recovery is unlikely and the pack should be replaced.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Stanley FMC688L Replacement Battery, 18V, 5000mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections