12-07-2015, 08:35 AM
I've owned the original Deltran Battery tenders since the mid 1990s, back when the charging leads had Molex style connectors, before they went to SAE.
The blasted things still work 20 yesrs later, but one thing I noticed is that they do not sufficiently "exercise" the battery by varying the voltage and charge current as a pulse or frequency charger does. This is more important on AGM and gel cell batteries which need this fluctuating charge to work their best.
I ended up with a bunch of dead $100-$175 batteries in my bikes as a result.
The later Deltran BT "Plus" models have the latest charging algorithms and software to deal with this better, so I gave away my old ones to friends and neighbors.
Still think the CTEK chargers are the best.
The blasted things still work 20 yesrs later, but one thing I noticed is that they do not sufficiently "exercise" the battery by varying the voltage and charge current as a pulse or frequency charger does. This is more important on AGM and gel cell batteries which need this fluctuating charge to work their best.
I ended up with a bunch of dead $100-$175 batteries in my bikes as a result.
The later Deltran BT "Plus" models have the latest charging algorithms and software to deal with this better, so I gave away my old ones to friends and neighbors.
Still think the CTEK chargers are the best.