{"product_id":"robomow-perimeter-switch-replacement-battery-12v-2000mah-ni-mh","title":"Robomow 12V Ni-MH Perimeter Switch Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRobomow Perimeter Switch — 12V Ni-MH Replacement Battery\u003c\/h2\u003e\n  \u003cp class=\"bpw-desc-lead\"\u003eThis replacement cell powers the Robomow Perimeter Switch, the boundary-setting component that tells compatible Robomow robotic lawnmowers where the lawn edges are. Fits MRK5002, MRK5002C, and MRK5006A units, along with 17 additional Robomow models including the RS630, RS622, and RS612. Rated at 12V and 2000mAh (24Wh), Ni-MH chemistry.\u003c\/p\u003e\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePerimeter Switch compatibility:\u003c\/strong\u003e These part numbers share the same 12V Ni-MH cell format, connector pinout, and BMS handshake — swapping between MRK5002, MRK5002C, and MRK5006A units requires no modification.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran full charge\/discharge cycles — the BMS held voltage steady under load and cut off cleanly at the low-voltage threshold without tripping fault states in the switch unit.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH first charge:\u003c\/strong\u003e Run two to three full charge cycles before regular use — Ni-MH cells reach rated capacity after conditioning, not straight out of the box.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003chr class=\"bpw-desc-divider\"\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Perimeter Switch battery matters for autonomous mowing\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe perimeter switch broadcasts the boundary signal the mower tracks during operation. A weakened battery causes an unstable or intermittent signal, which forces the mower to stop or misread the lawn edge. Maintaining a healthy cell in the switch unit keeps the boundary consistent and the mower on pattern.\u003c\/p\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMower stops mid-run or ignores the perimeter — here's the cause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the Robomow repeatedly stops, returns to base unexpectedly, or crosses the intended boundary, the perimeter switch battery is the first thing to check. A depleted Ni-MH cell drops voltage under load even when it reads partially charged at rest. Replace the cell, condition it through two full cycles, and retest the boundary signal before assuming a fault in the mower itself.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43175824785498,"sku":"BWCS-PMR506PW-1","price":49.27,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43175824818266,"sku":"BWCS-PMR506PW-2","price":59.12,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43175824851034,"sku":"BWCS-PMR506PW-3","price":66.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PMR506PW-1.webp?v=1775236298","url":"https:\/\/batteryweb.com\/products\/robomow-perimeter-switch-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}