{"product_id":"hi-target-zts-120-replacement-battery-74v-2600mah-li-ion","title":"Hi-Target BT10 ZTS-120 Replacement Battery 7.4V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHi-Target ZTS-120 Total Station — 7.4V Li-ion Replacement Battery (BT10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2600mAh Li-ion replacement for the Hi-Target BT10 battery pack. It fits the ZTS-120, ZTS-120R, and related total station variants used in land surveying and construction layout. Voltage and cell chemistry match the original spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZTS-120 and ZTS-120R compatibility:\u003c\/strong\u003e\n    These models share the same 7.4V battery rail, BT10 connector footprint, and BMS handshake protocol. Swapping between variants on-site is straightforward — the instrument reads the pack identically across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge-discharge sequences and monitored BMS cutoff response under simulated sensor initialisation loads. The protection circuit held within the expected voltage window without nuisance trips during angle-measurement and tracking sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the ZTS-120 instrument menu before heading to site. The instrument maps battery state during that routine. Skipping it causes premature low-battery warnings during your first measurement session, even with a fully charged pack.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout on the ZTS-120 after the pack sat unused in a carry case\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge slowly in storage. If a BT10-type pack drops below approximately 2.5V per cell, the BMS trips into a protective sleep state and the instrument will not power on — even when connected to a charger. The charger sees the pack as absent or faulty because the BMS is blocking the charge path. A slow pre-charge or trickle mode on a compatible Li-ion charger is usually enough to push the cell voltage back above the BMS recovery threshold, at which point normal charging resumes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAngle readings resetting mid-session while battery indicator still shows charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when sustained EDM or motorised drive load pulls the pack voltage below the ZTS-120's internal reset threshold — even briefly. The display may still show a battery percentage because the voltage-threshold indicator hasn't fully recalculated yet. The root cause is cell voltage sag under load, not remaining capacity. Check resting voltage with a multimeter: a healthy pack at partial charge should read above 7.2V at rest. If it reads below that after a short session, the cells have degraded and the pack needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360448872538,"sku":"BWCS-TRZ120SL-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360448905306,"sku":"BWCS-TRZ120SL-2","price":87.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360448938074,"sku":"BWCS-TRZ120SL-3","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRZ120SL-1.webp?v=1778614761","url":"https:\/\/batteryweb.com\/products\/hi-target-zts-120-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}