VINTRONS 1100mAh Battery For Garmin Nuvi 30, Nuvi 40, Nuvi 40LM, Nuvi 50, Nuvi 50LM, Capacity: 1100mAh / 4.07Wh Type: Li-ion Volts: 3.7V Size : 54.92 x 34.10 x 5.56mm Certificated with ISO9001, RoHS & CE;