Ships to contiguous 48 states. Drop in replacement for lead acid battery. We only guarantee these packs to capacity test at their individually tested amp hour rating. A packs ability (or lack thereof) to hold a full charge is a reasonable indicator of it's remaining lifespan. Because of this lifespan consideration the packs are priced on a curve instead of a set amount per Ah capacity. Item sent could have grey or black top versions as pictured, just depends on current stock. IMPORTANT - PLEASE READ:These packs self drain slowly due to the internal BMS and LED indicator.If these packs sit for too long or are discharged too low they will go into a safety mode that requires them to be trickle charged before they can be used again.  Specifications U1-12RT Voltage12.8 VNominal Capacity (C/5, 23°C)40 AhWeight (approximate) kg6.5 kgWeight (approximate) Ibs14.3 IbsDimension incl. Terminals LxWxH (mm)197 x 131 x 183Dimension incl. Terminals LxWxH (inches) 7.76 x 5.12 x 7.20Terminals, Female Threaded M6x1.0Specific Energy79 Wh/kgEnergy Density110 Wh/lStandard Discharge @ 23°CMax. Cont Current30 AMax. 30 sec. Pulse80 ACut-off Voltage10 VRun-time @ 10A240 minRun-time @ 30A80 minStandard ChargeCharge Voltage14.6 VFloat13.8 VRecommended20 ACharge Time*2.5 hrsDC Internal Resistance (Max)15 mΩEquivalent Lithium Content Per Module(g)48.6Part Number1004461