DC31MF is a high quality battery from Numax. The dimensions of the product are 330 x 172 x 239 mm. You should use the dimensions of your old battery as a guide for your selection. Durable Wet technology for your vehicle The DC31MF has a capacity of 105 Ah. The higher the value, the more electrical charge can be stored in the battery. Wet batteries like the DC31MF are suitable for marine and leisure equipment with everyday energy needs. They offer reliable performance for deep cycle use. The technology of this battery supports power requirements in leisure applications. You should consider this when buying Before you buy, check that the circuit and polarity of your new battery are identical to the values of the old model. The circuit shows whether the positive pole is on the right or left of the battery. To determine this, position the battery so that the poles are facing you. With the DC31MF, the circuit is 1, so the positive pole is on the left.