{"product_id":"lbook-v3-replacement-battery-37v-900mah-li-ion","title":"Lbook V3+ Smartphone Replacement Battery 3.7V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLbook V3+ \/ V3+ Light — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh (3.33Wh) lithium-ion cell for the Lbook V3+ and V3+ Light smartphones. It replaces the original battery when the cell no longer holds charge or shuts the device down unexpectedly. Physical dimensions are 53.00 × 34.00 × 4.80mm — measure your original before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV3+ and V3+ Light compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, voltage rail, and connector pinout. The BMS handshake behaviour is identical across the two variants, so a single cell covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through charge, load, and cutoff cycles on the bench. The BMS held its low-voltage cutoff correctly and did not trip under the combined screen and modem draw typical of this device.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one full discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the V3+ reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a charge curve calibrated to the original cell. When a new cell goes in, the IC is still reading against that old curve. This causes percentage jumps or a reading that drifts significantly from actual remaining charge. One full discharge down to auto-shutoff, followed by an uninterrupted charge to 100%, resets the coulomb counter and realigns the gauge to the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff, not a capacity fault. Under peak modem or display load, the cell voltage drops faster than the fuel gauge predicts, tripping the BMS cutoff before the reported percentage reaches zero. It is most common when the fuel gauge IC has not yet completed a full calibration cycle on the new cell. Run one complete uninterrupted discharge to shutoff and recharge to 100% — after that cycle, the gauge tracks the actual voltage curve and shutoffs at low percentage become rare.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404206407770,"sku":"BWCS-KMC500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404206440538,"sku":"BWCS-KMC500SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404206473306,"sku":"BWCS-KMC500SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KMC500SL-1.webp?v=1779369391","url":"https:\/\/batteryweb.com\/products\/lbook-v3-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}