{"product_id":"base-varia-replacement-battery-37v-1650mah-li-ion","title":"BASE VARIA 3.7V Replacement Battery 1650mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBASE VARIA — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1650mAh (6.11Wh) Li-ion cell for the BASE VARIA smartphone. It replaces the original battery when capacity has dropped to the point the phone can no longer hold a usable charge through a normal day. Dimensions are 51.83 x 50.78 x 5.41mm — verify these against your existing cell before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBASE VARIA fit:\u003c\/strong\u003e\n    The VARIA platform uses a 3.7V nominal cell with a fixed connector orientation tied to the charge IC on the motherboard. Voltage and physical footprint must match exactly — this cell meets both requirements.\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 bench and confirmed the BMS accepted the cell without triggering a low-voltage lockout. The charge IC reached full termination correctly at the top-of-charge threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before reporting accurate percentages to the OS.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff problem, not a capacity problem. Under peak load — screen at full brightness, mobile data active, or a call in progress — the cell voltage drops sharply below what the phone's power rail requires. The phone shuts off even though the OS still shows charge remaining. The fuel gauge IC hasn't yet learned where the new cell's voltage curve falls under load. One full discharge-charge cycle with the screen on resolves this in most cases.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting wrong battery percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VARIA's fuel gauge IC uses a coulomb counter calibrated to the original cell's impedance and discharge curve. After a cell swap, that stored profile no longer matches the new cell. The percentage reading drifts — often reading 15–20% higher than actual state of charge. Drain the phone until it shuts off automatically, then charge uninterrupted to 100% without removing the cable. After one full cycle, the coulomb counter resets against the new cell's actual curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404256247898,"sku":"BWCS-OT918XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404256280666,"sku":"BWCS-OT918XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404256313434,"sku":"BWCS-OT918XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT918XL-1.webp?v=1779369779","url":"https:\/\/batteryweb.com\/products\/base-varia-replacement-battery-37v-1650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}