{"product_id":"bollywood-m800-replacement-battery-37v-1700mah-li-ion","title":"Bollywood M800 Medical Device Replacement Battery 3.7V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBollywood M800 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1700mAh Li-ion battery is a direct replacement for the Bollywood M800 portable medical device. It fits the M800 form factor at 50.10 × 48.90 × 13.50mm. Replace the original cell when the device no longer holds charge or fails its power-on self-test due to a degraded battery.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM800 platform fit:\u003c\/strong\u003e\n    The M800 uses a single-cell 3.7V Li-ion configuration with a BMS that verifies cell chemistry at startup. This replacement matches that voltage rail and cell format so the device's charge IC communicates with it correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the M800's charge-discharge profile and confirmed the BMS accepted the new cell without throwing a battery fault after the first completed charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use startup protocol:\u003c\/strong\u003e\n    After installing this battery, allow the M800 to complete its full power-on self-test without interrupting it or removing power. The BMS runs a verification sequence at startup — cutting power mid-sequence flags a persistent battery fault that does not clear until the device completes a full reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M800 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe M800's BMS holds threshold values calibrated to the original cell's charge curve. A new replacement cell has a slightly different internal resistance profile in its first few cycles, which causes the BMS to read state-of-charge conservatively. This triggers a low-battery alarm even when the cell is at or near full capacity. Run one complete charge-discharge cycle and the BMS recalibrates its threshold to the new cell — the alarm clears and the charge indicator reads accurately from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eM800 will not power on after the replacement battery has been in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell voltage drops below approximately 2.5V, the M800's BMS enters a protection state and will not initiate boot — the device appears completely dead. Connect the M800 to its charger and leave it undisturbed for at least 30 minutes before attempting to power on. The charge IC applies a low-current recovery charge to bring the cell above the BMS wake threshold, typically around 3.0V, before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381479440474,"sku":"BWCS-BLM800MD-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381479473242,"sku":"BWCS-BLM800MD-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381479506010,"sku":"BWCS-BLM800MD-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLM800MD-1.webp?v=1778901170","url":"https:\/\/batteryweb.com\/products\/bollywood-m800-replacement-battery-37v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}