{"product_id":"ntt-docomo-docomo-foma-ht1100-replacement-battery-37v-1100mah-li-ion","title":"ELF0160 NTT DoCoMo FOMA HT1100 Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNTT DoCoMo FOMA HT1100 — 3.7V Li-ion Replacement Battery (ELF0160)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion cell built to fit the NTT DoCoMo FOMA HT1100 handset. It replaces the original ELF0160 battery, which degrades over time on aging Japanese 3G devices. Dimensions are 51.53 × 37.36 × 5.35mm — same physical footprint as the factory cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFOMA HT1100 fit:\u003c\/strong\u003e\n    The HT1100 uses a single-cell 3.7V pack with a three-pin connector carrying charge, ground, and thermistor lines. This replacement matches that pinout and physical latch geometry so the battery seats and communicates correctly with the handset's charge IC.\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, confirmed BMS handshake with the charge controller, and verified the protection circuit trips correctly at low-voltage cutoff before the cell reaches a damaging depth of discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to automatic shutoff, then charge uninterrupted to 100% before normal use. The HT1100's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step leaves the coulomb counter reading against stale reference data.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FOMA HT1100 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HT1100 stores discharge-curve data in the fuel gauge IC over hundreds of charge cycles. When a new cell goes in, that stored curve no longer matches the actual cell chemistry. The gauge reads voltage against the old model and calculates percentage incorrectly — often showing 100% that drops fast, or stalling near full. One full discharge-to-shutoff followed by a complete uninterrupted charge resets the reference point and brings percentage readings back in line.\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 happens when the cell voltage sags under load — screen backlight, radio transmit, or processor burst — faster than the fuel gauge IC predicted. The HT1100's modem draws a short current spike during a 3G handshake, and if the cell's internal impedance is higher than expected, voltage drops briefly below the protection threshold and the BMS cuts output. Let the phone complete two full discharge-charge cycles first. If shutdowns persist after calibration, check that the battery connector pins are fully seated — a high-resistance contact at the three-pin interface amplifies voltage sag under the same load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405254721626,"sku":"BWCS-DTS1SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405254754394,"sku":"BWCS-DTS1SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405254787162,"sku":"BWCS-DTS1SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DTS1SL-1.webp?v=1779370350","url":"https:\/\/batteryweb.com\/products\/ntt-docomo-docomo-foma-ht1100-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}