{"product_id":"black-decker-bdgl1800-replacement-battery-18v-1500mah-ni-mh","title":"Black \u0026 Decker 18V Grass Trimmer Compatible Battery HPB18","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlack \u0026amp; Decker BDGL1800 Series — 18V Ni-MH Replacement Battery (HPB18)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V, 1500mAh Ni-MH replacement battery for the Black \u0026amp; 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 \u0026amp; Decker models sharing this battery slot. The pack replaces OEM part numbers including HPB18, HPB18-OPE, A1718, and A18 among others.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e18V Black \u0026amp; Decker platform fit:\u003c\/strong\u003e\n    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.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on an 18V Black \u0026amp; Decker charger. The BMS accepted charge without fault codes, cell balancing completed normally, and the pack held voltage within spec across multiple discharge cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH storage before trimming season:\u003c\/strong\u003e\n    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.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red on a new or stored 18V Ni-MH pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eBlack \u0026amp; 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.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTrimmer bogs down mid-pass even with a charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eVoltage 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.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416072585306,"sku":"BWCS-BPS718PW-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416072618074,"sku":"BWCS-BPS718PW-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416072650842,"sku":"BWCS-BPS718PW-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BPS718PW-1.webp?v=1779760116","url":"https:\/\/batteryweb.com\/products\/black-decker-bdgl1800-replacement-battery-18v-1500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}