{"product_id":"honor-30-replacement-battery-385v-3850mah-li-polymer","title":"Honor 30 3.85V Replacement Battery 3850mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHonor 30 \/ 30S — 3.85V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3850mAh (14.82Wh) lithium-polymer cell fits the Honor 30 and Honor 30S smartphones. It replaces the original cell when capacity has degraded and the phone can no longer hold a full charge. Dimensions are 81.40 × 63.30 × 4.50mm — measure your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHonor 30 and 30S shared cell:\u003c\/strong\u003e\n    Both models run the same battery bay dimensions and connector pinout, so one cell covers either board revision. The BMS handshake protocol is identical across both variants.\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 Honor 30 platform. The BMS accepted the cell without fault codes, and the charge IC ramped current normally through the CC\/CV stages.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the coulomb counter locks in its reference points. Skipping this step is the main cause of inaccurate percentage readings post-swap.\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 Honor 30 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different voltage-versus-capacity curve than the original. The fuel gauge IC still references the old curve, so it thinks 25% remains when the cell voltage is already near cutoff. Under load — screen at full brightness or a 5G modem burst — the cell voltage drops below the BMS floor and the phone shuts off instantly. One full discharge cycle recalibrates the coulomb counter to the new curve. After that cycle, the percentage reading and actual shutdown point align.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eHonor's proprietary fast-charge protocol involves a handshake between the charger, the charge IC, and the BMS. On the first cycle with a new cell, the BMS may default to standard 5V charging while it validates the cell. This is a protective measure, not a fault. Charge fully once at standard rate, then reconnect with the original Honor fast charger. The handshake completes normally from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391944589402,"sku":"BWCS-HUP410SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391944622170,"sku":"BWCS-HUP410SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391944654938,"sku":"BWCS-HUP410SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP410SL-1.webp?v=1779142677","url":"https:\/\/batteryweb.com\/products\/honor-30-replacement-battery-385v-3850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}