Old-Biscuit wrote:
Trailer parasitic draws plus TIME drained them
They will recharge BUT sooner the better........
Damage is done every time battery voltage is drawn down below 50% charge (6.05V)
Really need to get them on a charger and get voltage back up....leaving them dead will KILL them
agreed, except that the trojans will give over 500 cycles drawn down to 25 percent state of charge. IIRC around 1000 at 50 percent. so going below 50 percent does some damage, but for most of us RV'rs, drawing them down to 25 percent when needed isn't going to affect overall life much.
And I can verify that since I had one set that had over 300 cycles down to 25 percent and another 200 down to 50 percent and they finally were getting weak after 14 years of use.
get them charged back up ASAP and equalized. and make sure you use a charger that can actually get them to 100 percent. many will NOT. you need to get the voltage up to about 14.8 V to get them fully charged.