{"product_id":"manta-ms1701-replacement-battery-37v-900mah-li-ion","title":"Manta MS1701 JB-4C Replacement Battery 3.7V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eManta MS1701 \/ TEL2405 \/ TEL2408 — 3.7V Li-ion Replacement Battery (JB-4C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh Li-ion cell replacing the JB-4C battery in the Manta MS1701, TEL2405, and TEL2408 smartphones. It restores power to devices where the original cell has degraded, swollen, or stopped holding a charge. Dimensions are 53.00 × 34.00 × 4.80mm — confirm these against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMS1701, TEL2405, TEL2408 fit:\u003c\/strong\u003e\n    All three models share the same JB-4C form factor, connector pinout, and voltage rail. The BMS protection circuit on each device expects a 3.7V nominal cell with the same physical footprint — swapping between models is not required, but the cell seats identically in each.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the bench. The BMS accepted the cell without triggering overcurrent or over-voltage cutoff. Charge termination occurred correctly at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use, disable fast charging if your variant supports it, then run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before reporting accurate percentages — skipping this step is why most users see percentage jumps in the first two 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 Manta MS1701 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new 900mAh cell has a different internal resistance profile than the worn cell the fuel gauge IC was calibrated against. Under peak load — screen on, mobile data active — voltage can sag below the BMS cutoff threshold even when the gauge still reads 20–30%. The phone cuts out not because the cell is empty, but because instantaneous voltage dropped under load. One full discharge-charge cycle recalibrates the coulomb counter and usually resolves this within two to three cycles.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a learned discharge curve from the previous cell. After swapping to a fresh 900mAh cell, the stored curve no longer matches actual cell behaviour — so the reported percentage jumps as the IC tries to reconcile mismatched data points. This is not a faulty cell. Charge the phone to 100%, allow it to discharge fully without interruption, then charge back to 100% uninterrupted. After that single cycle, the IC rewrites its reference curve against the new cell and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405022658650,"sku":"BWCS-NK4CHL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405022691418,"sku":"BWCS-NK4CHL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405022724186,"sku":"BWCS-NK4CHL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK4CHL-1.webp?v=1779369842","url":"https:\/\/batteryweb.com\/products\/manta-ms1701-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}