{"product_id":"energizer-hardcase-h280s-replacement-battery-37v-1900mah-li-ion","title":"Energizer H280S Replacement Battery 3.7V 1900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEnergizer HARDCASE H280S — 3.7V Li-ion Replacement Battery (H280S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1900mAh Li-ion battery replaces the original cell in the Energizer HARDCASE H280S smartphone. The H280S part number confirms a direct match to the HARDCASE H280S model — same connector, same physical footprint at 64.80 × 46.20 × 6.30mm. Capacity is sourced from the product data at 7.03Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHARDCASE H280S platform fit:\u003c\/strong\u003e\n    The H280S battery uses a fixed connector pinout and BMS handshake specific to this rugged smartphone line. Swapping to a generic cell with a mismatched protection circuit will trigger charge refusal at the charge IC — this cell carries the correct BMS profile for the H280S charge controller.\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 H280S platform. The BMS held within spec across both full-current charge and low-current trickle phases, with no cutoff trips during normal screen-on load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state — preventing early percentage-jump errors.\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  \u003cp class=\"bpw-desc-p\"\u003eThe H280S fuel gauge IC retains the discharge curve from the old, degraded cell after a swap. When the new cell hits a voltage point the IC associates with a steep drop on the old curve, it signals a low-battery shutdown — even though real capacity remains. The modem and display together draw enough current to cause a brief voltage sag that tips the IC past its cutoff threshold. One full discharge to 0% and a complete charge cycle forces the coulomb counter to relearn the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB charging not accepted on the first connection after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell sitting at storage voltage — typically 3.6–3.7V — can cause the charge IC to stall on handshake if the BMS hasn't completed its initialisation sequence. Plug in the cable and leave the phone off for 10–15 minutes before attempting a power-on; the charge IC needs to see a stable input without load negotiation running simultaneously. If the charging indicator still doesn't appear, disconnect, wait 30 seconds, and reconnect — this resets the USB enumeration on the charge controller. The cell should accept current once the BMS clears its pre-charge gate above 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391793135706,"sku":"BWCS-ERH280SL-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391793168474,"sku":"BWCS-ERH280SL-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391793201242,"sku":"BWCS-ERH280SL-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ERH280SL-1.webp?v=1779142036","url":"https:\/\/batteryweb.com\/products\/energizer-hardcase-h280s-replacement-battery-37v-1900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}