{"product_id":"brondi-smartphone-4g-replacement-battery-37v-2200mah-li-polymer","title":"Brondi SMARTPHONE 4G Compatible Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBrondi SMARTPHONE 4G — 3.7V Li-Polymer Replacement Battery (ICP445573P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2200mAh Li-Polymer battery replaces the OEM ICP445573P cell in the Brondi SMARTPHONE 4G. It fits the exact footprint at 76.50 × 56.80 × 5.10mm. Swap it in when your original cell no longer holds charge through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrondi SMARTPHONE 4G fit:\u003c\/strong\u003e\n    The ICP445573P is a single-cell Li-Polymer pack with a fixed connector and BMS pinout matched to the Brondi SMARTPHONE 4G charge IC. Any cell going in must match the 3.7V nominal rail — a voltage mismatch trips the protection circuit before the phone even boots.\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. The BMS handled end-of-charge termination cleanly at 4.2V and the protection circuit triggered correctly at the low-voltage cutoff threshold without latching the pack into lockout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle. This gives the fuel gauge IC time to recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated state — which is the main cause of erratic percentage readings in the first few days.\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 happens because the fuel gauge IC in the Brondi SMARTPHONE 4G was calibrated to the old cell's discharge curve. When the modem radio or display draws a burst of current, the new cell's voltage drops faster than the IC predicts — the phone sees that as a critical battery event and shuts down. One full discharge-to-cutoff cycle followed by a full charge lets the coulomb counter reset its end-point estimate. After that cycle, shutdowns in the 20–30% range should stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery during the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new high-impedance Li-Polymer cell has slightly higher internal resistance than a conditioned cell. The charge IC compensates by running at a higher voltage differential, which produces more heat than usual during the first two or three cycles. This is a temporary condition — internal resistance drops as the cell conditions. If the phone becomes hot enough to be uncomfortable to hold, stop charging and let it cool to room temperature before resuming; keep the first charges on a 5W supply, not a fast charger.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391796871258,"sku":"BWCS-BRS400SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391796904026,"sku":"BWCS-BRS400SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391796936794,"sku":"BWCS-BRS400SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BRS400SL-1.webp?v=1779142181","url":"https:\/\/batteryweb.com\/products\/brondi-smartphone-4g-replacement-battery-37v-2200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}