NT485LM is a 12V 5AH Sealed Lead Acid (SLA) rechargeable maintenance free battery Dimensions: 3.54“x 2.76“x 3.94“. Terminal: F1. Listing is for the Battery only. No wire harness or mounting accessories included. SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures, long service life and deep discharge recovery. Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures. Perfect replacement for EXP1240, UPG UB1240, MightyMax ML4-12, Power-Sonic PS-1240, Power King PK1240 and many more! 30-day refund policy and full 1-year warranty. Amazon doesn't deal with the return of battery-related products, so please contact the seller directly. Our Neptune support team is on standby for YOU. Neptune NT 485LM is a direct replacement for the Liftmaster 485LM battery. Used as a Liftmaster and Chamberlain garage door opener battery backup which allows for use when power is out, helping prevent lock-outs. Absorbant Glass Mat (AGM) technology for superior performance. Valve regulated, spill proof construction allows safe operation in any position. Easy day- battery replacement instructions 1. Disconnect power to opener. 2. Using a Philips head screwdriver, remove the battery cover on the motor unit. 3. Remove old battery and discard. 4. Partially insert new battery into motor unit with terminals facing out. 5. Connect red (+) and black (-) wires from motor unit to corresponding terminals on battery. 6. Replace battery cover. 7. Reconnect power. 2-year warranty Manufacturer warranty covers any qualitey realted issues, customer is responsible for shipping to and from the warranty facility. After 30 days only a replacement will be provided. Direct Replacement For: 804302, 23-289, 23-289B, 23-289A, 23289, BP4-12, BP4.5-12, BP5-12, CA1240, CFM12V4.6M, DG12-5, ES4-12, GP1245, GP1250, HR5.5-12, HR1221WF2, JC1240, LC-R125P, LC-RB124P, LC-R125P, LCR-12V4BP, LCR-12V5P, NP4-12, NP4-12P, NPH5-12, NPX-25, PC1250, PE4-12R, PE4.5-12R, PE12V4.5F1, PE12V4.0, PS-1242, PS-1250, PS1250, PS-1252, PXL12050, RBC45, SLA-12V4-5, UB1245, UB1250, UB1250A, WP4-12, WP4.5-12, WP5-14