{"product_id":"uniled-4-ht-aa-1200-replacement-battery-48v-1500mah-ni-mh","title":"Uniled 4 HT AA 1200 Replacement Battery 4.8V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUniled 4 HT AA 1200 — 4.8V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 1500mAh Ni-MH battery pack for the Uniled 4 HT AA 1200 and compatible models including 138057, 290044, and 290047. It replaces the original cell pack when capacity has degraded and the light no longer reaches full brightness or holds charge through a full work session. Voltage and cell count match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4 HT AA 1200 series compatibility:\u003c\/strong\u003e\n    These models share the same 4.8V four-cell NiMH configuration, connector pinout, and LED driver input range. The BMS recognises the charge curve without requiring reset or firmware update.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the 4 HT AA 1200 platform and confirmed the LED driver received stable current from full charge down to the low-battery cutoff threshold. No false low-battery trips occurred during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle brightness calibration:\u003c\/strong\u003e\n    Run the light on medium brightness for the first full cycle. The LED driver adjusts current output against the new cells before you push it to maximum draw — this prevents an early low-voltage trip that can occur when a new pack hasn't been conditioned.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLED work light dimming before the low-battery indicator activates\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LED driver in the 4 HT AA 1200 begins reducing current output before the pack voltage drops to the BMS trip point. This is intentional — the driver protects the LED array from unstable current as cell voltage falls under load. You'll see noticeable dimming while the battery indicator still shows charge remaining. This is normal behaviour and not a fault with the replacement pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLight not reaching full brightness after installing a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Ni-MH pack often ships at a partial state of charge, and the LED driver requires a minimum input voltage to sustain full brightness output. If the light appears dim immediately after installation, the pack hasn't reached its operating voltage yet. Charge the pack fully before use — Ni-MH cells should reach at least 5.4V at pack level under no-load before being put to work. After a full charge cycle, full brightness should restore immediately on power-on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381320941658,"sku":"BWCS-KLE734SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381320974426,"sku":"BWCS-KLE734SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381321007194,"sku":"BWCS-KLE734SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KLE734SL_1.webp?v=1778899964","url":"https:\/\/batteryweb.com\/products\/uniled-4-ht-aa-1200-replacement-battery-48v-1500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}