{"product_id":"wiko-pulp-3g-replacement-battery-38v-2500mah-li-polymer","title":"Wiko Pulp 3G Compatible Battery 3.8V 2500mAh 5251","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWiko Pulp 3G \/ Pulp 4G \/ Robby \/ Rainbow Jam 4G — 3.8V Li-Polymer Replacement Battery (5251)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 2500mAh Li-Polymer cell replaces OEM part 5251 (also cross-referenced as S104-V02000-012, S104-V02000-001, and S104-V02000-000). It fits the Wiko Pulp 3G, Pulp 4G, Robby, and Rainbow Jam 4G smartphones. At 76.95 × 59.95 × 4.20mm, it matches the original cell footprint and connector position exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulp 3G \/ Pulp 4G \/ Robby \/ Rainbow Jam 4G compatibility:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, 3.8V nominal voltage rail, and three-pin connector pinout, which is why they all draw from the same OEM part family. The BMS handshake on each device accepts this cell without triggering an unrecognised-battery warning.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Pulp 3G unit, monitoring charge termination voltage and BMS cutoff under simulated screen-on and modem load. The protection circuit held the low-voltage cutoff at 3.0V and terminated charge correctly at 4.35V — no anomalous shutdowns across three full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC pushes higher current into an uncalibrated cell — preventing erratic percentage readings from the first hour.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pulp 3G reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Wiko Pulp 3G uses a coulomb-counter fuel gauge IC that builds its charge model against the old cell's internal resistance and discharge curve. When a new cell goes in, the stored model no longer matches reality — the phone reads \"40%\" while the cell voltage is already near cutoff. One full, uninterrupted discharge down to automatic shutdown followed by a complete charge to 100% resets the learned curve. After that cycle, percentage accuracy returns to within a few percent across the full range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure, not a capacity problem. Under combined 3G modem and display load, the Pulp 3G draws enough current that a cell with any elevated internal resistance drops below the BMS cutoff threshold — around 3.0V — even though the fuel gauge still shows charge remaining. A fresh Li-Polymer cell at 2500mAh should sustain load voltage well above 3.2V at 30% state-of-charge. If shutdowns persist after the calibration cycle described above, check that the battery connector tabs are fully seated — a partially connected terminal increases effective resistance and worsens voltage sag under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404132122714,"sku":"BWCS-WKP300SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404132155482,"sku":"BWCS-WKP300SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404132188250,"sku":"BWCS-WKP300SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WKP300SL-1.webp?v=1779369061","url":"https:\/\/batteryweb.com\/products\/wiko-pulp-3g-replacement-battery-38v-2500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}