Im in the market for a lithium battery that will only run my Garmin 106sv ultra. After searching the web Ive read a lot of conflicting post on the topic, so I e mailed Li Time battery co. they recommend a 16v over a 12v, but if I went that route Id have to buy a new charger also. Im leaning toward a 12v 65ah but wanted to hear the pros and cons form guys who use them.