OPTI-UPS BT825 (825BT) 12V 12Ah UPS Battery — AJC® Replacement

AJC® replacement battery compatible with OPTI-UPS BT825 / 825BT models. This sealed lead‑acid (AGM) UPS battery delivers 12V (12 Volts) at 12Ah capacity and is offered as a direct-fit alternative. Specifications: Voltage: 12V (12 Volts); Capacity: 12Ah; Terminals: F2; Chemistry: Sealed Lead Acid (AGM); Dimensions: Length 5.94 in, Width 3.9 in, Height 3.78 in; Weight: 8.3 lbs. Disclaimer: Our products are not affiliated with or authorized by OPTI-UPS. Why choose AJC® replacements: high-quality, budget-friendly batteries suitable for thousands of applications; manufactured to match OEM form and fit so installation is simple and precise; millions sold worldwide; UL recognized component; supported by a straightforward 30-day return policy and a 12-month warranty. SLA battery maintenance: recharge after each use to avoid capacity loss, do not allow complete discharge, inspect terminals periodically for corrosion or wear, and always store the battery fully charged in a cool, dry place (68°F/20°C). Recycle used batteries — do not dispose of them in household trash.