When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The early models had an issue with battery drain, the current model does not. I leave mine in all the time and do not use a battery tender. I go more than a week from time to time without issues so far. If I was going to leave for an extended period of time, say more than 2 weeks, I'd probably pull it just to be sure since people have complained about battery issues even without the Range device when not using the vehicle for an extended period.
New extender from factory (not Amazon or other) over a year ago. Battery now 6 yrs old. Car (13,000 miles) sometimes sits over 2 weeks with no issues. I hook up a battery tender if approaching 3 weeks just in case.