{"product_id":"bosch-11536vsr-replacement-battery-36v-4000mah-li-ion","title":"Bosch 36V Cordless Drill Compatible Battery 4000mAh BAT818","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBosch 11536VSR \/ BAT836 Series — 36V Li-ion Replacement Battery (BAT836)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 36V, 4000mAh Li-ion replacement battery for Bosch cordless drill\/drivers, including the 11536VSR, 18636-01, 18636-02, and 18636-03. It replaces OEM part numbers BAT836, BAT837, BAT818, BAT819, and the 2 607 336 series. Capacity is 144Wh — identical to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e11536VSR and 18636 platform fit:\u003c\/strong\u003e\n    These models share the same 36V rail, battery housing latch geometry, and BMS communication protocol. The same pack powers all variants without modification or adapter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge and discharge cycles on the 11536VSR platform. The BMS engaged correctly at cutoff voltage, balancing resumed on the second charge cycle, and cell voltages held within 20mV across the pack under load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush conditioning on first use:\u003c\/strong\u003e\n    On first use, run the drill at half load for two cycles before full-torque applications. This lets the BMS profile the motor's inrush current draw and set accurate overcurrent thresholds before you hit hard material.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff on 36V motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 11536VSR draws a spike of current the moment the trigger is pulled — this inrush can be four to six times the steady-state draw. A new pack with a freshly initialised BMS may not yet have a calibrated overcurrent threshold for this specific motor profile. If the BMS trips that threshold, it cuts the cell output instantly to protect the cells. Running two partial-load cycles first gives the BMS enough current history to stop tripping on normal motor start.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red and refusing to accept the pack after storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs stored for more than 60 days can drop below the charger's acceptance voltage — typically around 30V on a 36V pack. The Bosch charger reads this as a fault and blinks red rather than starting a charge cycle. To recover the pack, place it on the charger, wait 90 seconds, then remove and reinsert it — some Bosch chargers have a trickle-start routine that activates on the second insertion. If the pack rests at or above 30V on a multimeter across the terminals, the charger should eventually accept it; below 28V, cell recovery is unlikely.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416011538522,"sku":"BWCS-BST818PX-1","price":157.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416011571290,"sku":"BWCS-BST818PX-2","price":186.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416011604058,"sku":"BWCS-BST818PX-3","price":208.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BST818PX-1.webp?v=1779759245","url":"https:\/\/batteryweb.com\/products\/bosch-11536vsr-replacement-battery-36v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}