i might add i use a kinetik 1400 and have for over 3 years the lowest voltage my alt goes is 14.2 v when the engine is cold it is 14.4v for at least a minute or two. in that time i have put well over 50k miles on it, spent a great deal of time engine off tuning without a charger as to tune my system i have too hook it up to a lap top and when i tune i also use an AC rta. longest session i have had was over an hour..no big deal right? over the weeks i was tuning i killed a napa wet cell (i do believe squeak9798 was there for that) and a 2 year old optima (i was either too dumb or honest to take it to WALMART for a swap). I also take my truck to outdoor RC races and charge up 4-10 battery packs while listening to music alot of the time all engine off and have not ever killed the battery (that is usually from 10 am-5 pm on a saturday). infact after i am done i can crank up the system on my way home and i wont get any dimming. so who was this rep/ tech that told you 13.7? was it erik? was it rich?
quoted straight from kinetiks site
"How do I charge and test my Kinetik Power Cells?
Kinetik Power Cells can be charged in a properly functioning vehicle charging system or with any high quality 12 volt battery charger. For best results and maximum power output and lifecycle for outboard charging, use a Kinetik power supply or maintainer to charge and maintain your Power Cell. If you are charging with an automotive type charger always use chargers that are “voltage regulated, two stage, Automatic or microprocessor controlled”. Do not use chargers that only have amp settings such as 2, 5 or 10 amp settings that do not regulate voltage. These chargers increase in voltage as the battery or Power Cell charges leading to an over voltage situation that will ruin the cell. This is true for any 12 volt battery or Power Cell. The proper charging range for Kinetik Power Cells is between 13.5 and 14.4 volts . Any quality battery charger will stay in this range. To “bulk” charge or quick charge your Power Cell for one to three hours use voltages between 14 and 14.4 volts. To saturate (fully charge) or maintain your Power Cell for extended periods of times up to months at a time, use a float voltage between 13.5 and 13.8 volts. Kinetik power supplies and maintainers automatically switch from bulk to float charge as needed during the charging process to optimize the performance, lifecycle and charging time of your Power Cell. "