{"product_id":"metropcs-r860-caliber-replacement-battery-37v-800mah-li-ion","title":"EB664239HA MetroPCS R860 Caliber Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMetroPCS R860 Caliber — 3.7V Li-ion Replacement Battery (EB664239HA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-ion replacement battery for the MetroPCS R860 Caliber smartphone. It also fits the SCH-R860, SCH-R860ZKAMTR, and Ativ Odyssey. OEM part number EB664239HA cross-references to EB664239HABSTD — both refer to the same cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR860 Caliber and SCH-R860 variants:\u003c\/strong\u003e\n    These models share the same battery bay dimensions and 3.7V power rail. The connector pinout and BMS handshake are identical across the SCH-R860ZKAMTR and Ativ Odyssey variants, so one cell covers all four.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the R860 platform. The BMS accepted the charge protocol without interruption, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one complete discharge-charge cycle before normal use. The fuel gauge IC on the R860 is calibrated to the old cell's discharge curve — one full cycle lets it remap against the new cell before reporting accurate percentages.\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 R860 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe R860's modem and display together draw a sharp current spike that a degraded or freshly installed cell can fail to sustain. When cell voltage drops below the BMS cutoff threshold under that load — even if the fuel gauge still shows 20–30% — the phone shuts off immediately. This is a voltage cliff, not a capacity problem. The fuel gauge IC hasn't yet learned the new cell's discharge curve, so it reports a percentage that doesn't match actual available voltage. One full discharge-charge cycle corrects the curve map and moves the apparent cliff back to below 5%.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage, and if the R860's replacement battery dropped below approximately 2.5V per cell, the BMS enters lockout to prevent damage. The phone will show nothing when you press power — no logo, no charge indicator. Connect the phone to a wall adapter, not a USB port, and leave it for 15–20 minutes without pressing any buttons. The charge IC will trickle current into the cell until voltage rises above the BMS re-enable threshold, typically around 2.9V, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405125124186,"sku":"BWCS-SMR850SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405125156954,"sku":"BWCS-SMR850SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405125189722,"sku":"BWCS-SMR850SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR850SL-1.webp?v=1779370244","url":"https:\/\/batteryweb.com\/products\/metropcs-r860-caliber-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}