inputs.text: spend - needed replacehement battery nuvi 850 looking 40 original equipment replacehement not use gps often looking deal replacehement battery amazon several choose one cheapest made somewhat leery however slightly higher mah rating 1150 swayed try others 1000 compared original 1100 mah lifetime warranty lose battery arrived time fit nuvi perfectly gps started right surprise fully charged not done much gps since receiving battery looks promising far would recommend product anyone wanting save garmin gps replacehement battery update loaded several addresses gps yesterday soon realized previous problehems device gone no hit keys several times device receive no freezing wife used today travelled town said worked flawlessly highly recommend battery garmin working like new thanks upstart