Black & Decker 18V Grass Trimmer Compatible Battery HPB18
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 18V Grass Trimmer Compatible Battery HPB18 - 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
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Black & Decker 18V Grass Trimmer Compatible Battery HPB18 - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
1500mAh
Black & Decker BDGL1800 Series — 18V Ni-MH Replacement Battery (HPB18)
This is an 18V, 1500mAh Ni-MH replacement battery for the Black & Decker BDGL1800 cordless grass trimmer and compatible 18V platform tools. It fits the BDGL1800 and BDGL18K-2 trimmers, plus XTC183BK, XTC18BK, and over 160 additional 18V Black & Decker models sharing this battery slot. The pack replaces OEM part numbers including HPB18, HPB18-OPE, A1718, and A18 among others.
- 18V Black & Decker platform fit: These models share a common 18V rail, connector pinout, and BMS handshake protocol. The BDGL1800 trimmer draws a relatively light current load compared to drills or saws on this platform, so the same pack serves both trimmer and tool use without modification.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on an 18V Black & Decker charger. The BMS accepted charge without fault codes, cell balancing completed normally, and the pack held voltage within spec across multiple discharge cycles.
- Ni-MH storage before trimming season: If the trimmer sits unused for more than two months, run one full discharge-to-charge cycle before seasonal use. Ni-MH cells left in partial charge develop voltage depression that causes premature cutoff during trimming passes.
Charger blinking red on a new or stored 18V Ni-MH pack
Black & Decker 18V chargers run a voltage check before accepting a pack. If the cells have self-discharged below roughly 1.0V per cell during storage, the charger reads the pack as faulty and blinks red rather than beginning the charge cycle. This is a charger acceptance threshold issue, not a dead battery. A brief trickle boost — either through a compatible charger with a recovery mode or by connecting another charged pack in parallel for 30 seconds — raises the pack above the acceptance floor. Once cell voltage clears 1.1V per cell, standard charging resumes normally.
Trimmer bogs down mid-pass even with a charged battery
Voltage sag under load is the cause here — not a dead pack. When the trimmer head hits thick grass or catches on debris, current draw spikes and cell voltage temporarily drops below the tool's operating threshold, causing the motor to slow or stall. On Ni-MH packs, this sag worsens as cells age and internal resistance rises. Check the battery contact rails on both the pack and the trimmer for corrosion or debris — even 0.1Ω of added contact resistance measurably deepens the sag under load. Clean contacts with isopropyl alcohol and confirm the pack reads at or above 18.5V at rest before trimming.
Compatible Models
Replaces Part Numbers
Technical Specifications
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 Black & Decker BDGL1800 trimmer cuts out the moment I squeeze the trigger — is the battery the problem?
This is a BMS overcurrent trip, not a weak battery. The trigger-pull inrush current from the trimmer motor spikes briefly above the BMS protection threshold, tripping a cutoff before the motor even reaches speed. It happens most often when the pack has been sitting discharged or when contact resistance is high at the terminal rails. Clean both the pack and tool contacts with isopropyl alcohol, then confirm resting voltage reads at least 18.5V before use — that usually clears it.
The battery feels warm after only a short trimming session and the tool shuts off — what's going on?
Ni-MH cells generate more heat than Li-ion under sustained load, and the BDGL1800's enclosed battery housing limits airflow. When cell temperature climbs past the BMS thermal threshold, it triggers a cutoff to protect the cells. This happens faster on warm days or when trimming dense growth continuously. Let the pack cool for 15 minutes in open air before restarting — if cutoffs keep occurring at short intervals, check that the battery latch is fully seated so the pack sits flush against the housing contacts.
After two years of use, the trimmer runs noticeably weaker even on a fresh charge — is the new replacement pack going to do the same?
Capacity fade on the original pack came from repeated shallow cycling — topping up after short sessions without running the pack down properly. Ni-MH chemistry degrades faster under that pattern than Li-ion does. To slow fade on the replacement pack, run it through a full discharge cycle every four to six weeks rather than topping it up after every session. A full cycle means running the trimmer until the tool slows noticeably, then charging to 100% — this keeps the cell voltage calibration accurate and slows internal resistance build-up.
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