{"product_id":"wahl-93836-200-replacement-battery-37v-1200mah-li-ion","title":"Wahl 93836-200 Replacement Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWahl 93836-200 — 3.7V Li-ion Replacement Battery (93836-200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1200mAh Li-ion battery replaces the original cell in the Wahl 93836-200 cordless shaver. It restores power to the shaver motor when the factory battery no longer holds a charge. Dimensions are 65.60 × 17.50 × 14.30mm — confirm these against your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWahl 93836-200 shaver fit:\u003c\/strong\u003e\n    This cell matches the voltage rail and physical footprint of the 93836-200 platform. The BMS on this shaver expects a 3.7V nominal cell — swapping to a different voltage will trigger a protection fault on first charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the 93836-200 platform. The BMS accepted the cell without error, and the motor ran at full speed through the discharge curve without triggering early cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCharging port care after rinsing:\u003c\/strong\u003e\n    Dry the charging port completely before connecting to the charger. Moisture bridging the charging contacts trips a BMS protection fault — the shaver reports a dead battery, not a charging error, which sends most users chasing the wrong fix.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCapacity fade from daily partial charging on the 93836-200\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells in compact shavers degrade faster when charged daily from a partial state rather than run through fuller cycles. The 93836-200's indicator reads state-of-charge from voltage, so as the cell ages and its internal resistance rises, the voltage drops faster under motor load. The indicator drifts — it shows more charge remaining than the cell can actually deliver. Replacing the cell resets this drift, but the same pattern will return if daily top-up charging resumes immediately after light use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eShaver motor speed dropping before the indicator shows low\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is voltage sag under motor load — not a dead battery. The shaver motor pulls a short current spike each time it starts, and an aged or damaged cell can't hold its voltage through that spike. The BMS reads the voltage dip as a low-cell condition and throttles power to the motor before the indicator catches up. If the shaver recovers speed after a few seconds of lighter contact, the cell is the cause. Replace the cell and confirm the charging voltage sits between 4.1V and 4.2V at the end of a full charge cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416123474010,"sku":"BWCS-WXH836SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416123506778,"sku":"BWCS-WXH836SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416123539546,"sku":"BWCS-WXH836SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WXH836SL-1.webp?v=1779760331","url":"https:\/\/batteryweb.com\/products\/wahl-93836-200-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}