{"product_id":"blackdecker-as36ln-replacement-battery-37v-2900mah-li-ion","title":"3.7V Black\u0026Decker AS36LN Replacement Battery 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlack\u0026amp;Decker AS36LN Cordless Screwdriver — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 2900mAh Li-ion replacement battery for the Black\u0026amp;Decker AS36LN and compatible cordless screwdrivers. The AS36LN runs on a small-format lithium cell that powers its 180 RPM motor and 4 N·m torque output. At 10.73Wh and measuring 66.65 x 19.50 x 18.50mm, it fits the tight battery compartment these compact screwdrivers use.\u003c\/p\u003e\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConfirmed fit across AS36LN, BDCS36G, GSL200, and related models:\u003c\/strong\u003e These screwdrivers share the same 3.6–3.7V voltage rail, connector type, and cell footprint, so one BMS configuration covers the full compatibility list.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran full charge\/discharge cycles — the BMS held voltage steady under torque load and triggered the low-voltage cutoff cleanly without cell damage.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after storage:\u003c\/strong\u003e Run a full charge before first use, even if the battery shows partial charge — Li-ion cells at this capacity benefit from a complete initial cycle to calibrate the BMS state-of-charge reading.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003chr class=\"bpw-desc-divider\"\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy cell size matters in compact screwdrivers\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe AS36LN uses a slim single-cell Li-ion pack rather than a multi-cell stack. That keeps the handle narrow but means the BMS has no redundancy — every protection function runs through one circuit. This replacement matches the original cell dimensions precisely at 66.65 x 19.50 x 18.50mm, so the contacts seat fully and the housing closes without forcing.\u003c\/p\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eScrewdriver won't spin at full speed — likely a voltage sag issue\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen an aging Li-ion cell degrades, internal resistance rises and voltage sags the moment the motor draws current. The screwdriver may start slowly or stall mid-drive on harder screws even though the charge indicator looks fine. A new cell with lower internal resistance restores the voltage headroom the motor needs to reach 180 RPM under load. If the problem persists after fitting a new battery, check that the contacts are clean and seated fully.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43175822983258,"sku":"BWCS-WGF300VX-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43175823016026,"sku":"BWCS-WGF300VX-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43175823048794,"sku":"BWCS-WGF300VX-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WGF300VX-1.webp?v=1775236276","url":"https:\/\/batteryweb.com\/products\/blackdecker-as36ln-replacement-battery-37v-2900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}