{"product_id":"smiths-wz50c2-replacement-battery-12v-1600mah-ni-mh","title":"Smiths WZ50C2 Replacement Battery 12V 1600mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSmiths WZ50C2 Series — 12V Ni-MH Replacement Battery (160AAH10YMLZ)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 1600mAh Ni-MH replacement battery for Smiths portable medical equipment. It fits the WZ50C2, WZ50S, WZS50F2, WZ50C6, and additional models in this series. Voltage and capacity match OEM specifications exactly — 12V, 1600mAh, 19.2Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWZ50 platform compatibility:\u003c\/strong\u003e\n    The WZ50C2, WZ50S, WZS50F2, and WZ50C6 share the same battery bay dimensions, 12V rail, and BMS connector pinout. One cell pack covers all these variants 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 the WZ50 charge-discharge sequence and monitored BMS handshake at each stage. The protection circuit tripped correctly at low-voltage cutoff and accepted a full recharge without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the device complete its full startup self-test cycle without interruption. The WZ50 BMS runs a chemistry verification routine at boot — cutting power during this sequence locks in a false battery fault that won't clear until the next complete reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWZ50 device not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WZ50 runs a BMS learn cycle on first use with a new cell. If the device stalls mid-boot, the battery voltage is likely sitting below the BMS initialisation threshold — common after a new pack has been in storage. Connect the charger before powering on, let it reach at least 12.5V, then attempt boot. One full charge-discharge cycle completes the learn process and clears the fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggering immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WZ50 charge IC applies a conservative upper limit on an unfamiliar cell, so the first charge often terminates early — the indicator reads full but cell voltage is 11.8–12.0V rather than the 12.5V the BMS alarm threshold expects. This isn't a faulty pack. Run one complete charge-discharge-recharge cycle and the charge IC recalibrates to the actual cell capacity. After that cycle, the low battery alarm clears at its correct threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381519908954,"sku":"BWCS-SWZ502MD-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381519941722,"sku":"BWCS-SWZ502MD-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381519974490,"sku":"BWCS-SWZ502MD-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWZ502MD-1.webp?v=1778901385","url":"https:\/\/batteryweb.com\/products\/smiths-wz50c2-replacement-battery-12v-1600mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}