Cameron Sino 750mah Battery For Garmin Nuvi 40, 40lm, Nuvi 52, 52lm, 56lmt,66lm,68lmt,2689lmt,2689lmt 6-inch, Note The Connector - Digital Batteries - AliExpress
Gomadic Intelligent Compact Car / Auto DC Charger suitable for the Garmin Nuvi 40 40LM - 2A / 10W power at half the size. Uses Gomadic TipExchange Tec - Walmart.com
Amazon.com: Replacement Battery for Garmin Nuvi 40 Nuvi 40LM Nuvi 52 Nuvi 52LM Nuvi 56LMT Nuvi 66LM Nuvi 68LMT Part NO GARMIN361-00056-05 361-00056-11 : Electronics