Sure. But those of us in climates where winters are cool, and we can't drive the cars, then that kills batteries but CTek will keep it warm. Maybe its about not shortening life....but that's semantics.In my observation, tender doesn't extend life. Driving the car does the best job of battery maintenance. This is based on people who use tenders vs don't and when batteries are being replaced or not.
Correct me if I'm wrong, but I thought CTek had a recondition cycle that discharged and charged the battery at intervals whilst plugged in......origionally that was their major usp.lithium batteries (pretty much any Lithium chemistry) don't do well maintained at full charge (unlike lead acid chemistries). Keeping it pegged at the top end (or bottom) of the range diminishes total # of cycles of which they are good for thousands when new. Best for the battery is actually storing mid-range, state of charge (SOC).
Kind of like when you receive your new iPhone, which might have been built weeks or months before. It will come at 50% +/- 10% charge, but not at 100% or 0%.
If you read Apple's term storage instructions, they'll tell you to put the battery in mid range for long term storage.
CTEK should make a trickle charger which holds @ 50% SOC, maybe 13.1 volts.
Best practice might be: plug it in overnight and charge to full. Then let is slowly bleed down and maybe plug back in a month later.
Doug
