Battery Tender "Not a Charger"

[alanmcorcoran]

Hey guys, I left my Strat in the On position for over four days and, naturally it won't start. I looked into a Battery Tender Plus, but the lady at Deltran said their products "won't charge dead batteries." Is she just being overly cautious, or has anyone else found this to be the case? Has anyone left the headlight on for a week and then reviived their battery with a Battery Tender?

If Battery Tender is no good, can you recommend another method of recharging the battery?

(I realize I may need to get a new battery, but I want to try recharging this one first.)