Davyducky

Does anyone know if it is wrong to start the engine while the battery tender (live and plugged in) is still connected to the battery?

george vee

I did it by mistake and had no issues

gunterwalker

I don't see a problem with it. I have started it with a charger hooked up before.

carlrx7

i dont see the battery tender liking this.

oldmansan

Why would you?

San

j_digi454

I've done both a few times with no issues.

LEAVINU

Ditto for me.

Definitely don't think one should make it a practice to do so as there is no reason to, but it can happen by mistake as it did with me a couple of times.

Bill Curlee

I wouldnt make a habbit out of it but, it shouldnt hurt anything if it wasnt left on for a long period of time.

BC

c6coop

I've done it, too. No problems.
coop

SinisterC6

i did and it fried all the electronics in my house from the current spike. just kidding, did it a few times and no issues

Gene Culley

The battery tender only keeps the battery up to the full charge. If you start your vehicle it is not going to have issues!

Bandit1

There is a 'sequenced' startup and shutdown procedure for the tender. The main purpose for that is polarity. As long as you don't make it a habit of starting the car while the tender is connected to the vehicle and a power source, you shouldn't have any problems. Keep in mind the tender does have protective circuits.....probably idiot proof for us forgetful guys.