BOSS CAP2B won't charge?

dont waste you time energy or money on a cap, they dont help and if anything they put more of a strain on your cars stock charging system

if you are having charging issues you need to look into doing the "big3" and/or upgrading your alternator

A cap does put a strain on the charging system. The alternator has to recharge it every time it discharges. I have never had a cap in my 20+ years of having a system and installing stereos/amps/speakers as a hobby for friends/family/myself. I am pushing 1000 RMS to my pair of 12's, plus my mids/highs amp, which is another 200 RMS. And I have the original alternator, with 255,000 miles on it. And it is a 105-amp alternator. Do the Big 3 on your vehicle will help, and if you need more get a hi output alternator.

Get someone to check it out, you may have damaged something (or not but you won't know until someone does). A cap doesn't strain the electrical system, it provides a buffer so the alternator doesn't receive the power demand spike. A cap can quickly discharge in response to the sudden power draw of an amp. An alternator isn't designed to increase output quickly or dramatically so running a big stereo without a cap or second battery clost to the amp can result in burning out the alternator. if the other guy was referring to capacity, he's correct in that a cap doesn't add any more power to the system so you can still run into power shortage issues.