{"product_id":"stonex-p7-controller-replacement-battery-74v-1400mah-li-polymer","title":"Stonex P7 Controller Replacement Battery BP-1S 7.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eStonex P7 Controller \/ S3 \/ S6 \/ S9 — 7.4V Li-Polymer Replacement Battery (BP-1S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the BP-1S Li-Polymer battery for the Stonex P7 Controller and compatible S-series handheld survey instruments. It runs at 7.4V with a 1400mAh (10.36Wh) capacity. The P7 Controller is a field data collector used with GNSS receivers and total stations, and this pack keeps it running when AC power is not an option.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP7 Controller and S-series compatibility:\u003c\/strong\u003e\n    The P7, S3, S6, and S9 share the same BP-1S battery form factor, voltage rail, and connector geometry. The BMS handshake is identical across the series, so one pack covers all four instruments without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through simulated GNSS acquisition loads and total station sensor polling. The BMS held the output rail stable under the current spikes that occur at sensor initialisation — no cutoff events across the test runs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment calibration:\u003c\/strong\u003e\n    After installing, run a full calibration cycle through the instrument menu before heading into the field. The P7 maps battery state during that calibration sequence — skipping it causes premature low-battery warnings during your first measurement session, even with a full charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout after the P7 sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly during storage. If the pack voltage drops below the BMS recovery threshold — typically around 2.5V per cell — the protection circuit locks out to prevent further discharge damage. When this happens, the P7 will not power on and the charger shows no activity. Connecting the pack to a compatible Li-Po charger with a recovery or boost mode for 10–15 minutes is usually enough to bring the cell voltage back above the re-initialisation threshold. Once the charger shows normal charging current, the BMS has recovered and you can proceed with a full charge cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eP7 display showing an inconsistent battery percentage after reboot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe P7's battery indicator is voltage-threshold based — it reads cell voltage and maps it to a percentage. A new or freshly recovered pack has a slightly different voltage curve than the depleted cell it replaced, so the instrument's indicator can read erratically for the first few cycles. This is not a fault with the pack. Run two to three full charge-and-use cycles through normal survey operation, and the indicator will stabilise as the instrument recalibrates its thresholds to the new cell's curve. After that, the percentage readout tracks consistently through a working session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360527122522,"sku":"BWCS-STP700SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360527155290,"sku":"BWCS-STP700SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360527188058,"sku":"BWCS-STP700SL-3","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-STP700SL-1.webp?v=1778615963","url":"https:\/\/batteryweb.com\/products\/stonex-p7-controller-replacement-battery-74v-1400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}