Battery tenders?

I have a battery tender, worked great last winter for storage, i removed the battery and brought it inside and hooked it up all winter, No problems,  My question is could you use a single tender in series to 2 separate batteries.
 
I am thinking as long as both batteries are charged and newer the battery tender can just send it's  "trickle" then it wouldn't cause much of a problem? I only see a problem if one of the batteries is older and doesn't hold the charge and would cause the tender to go into charge mode more often than it should? opinions?

You could but the batteries must be connected in parallel, be the same voltage (# of cells), same type (cell chemistry) and be more or less fully charged.  Capacities don't need to be the same.  I've got a 26AH and a 4AH that have been sharing the same charger for 3 years.  They just sit there happy as clams at 13.2 volts day after day.
 

 

ideally yeah you can, but its not reccomended.  Just spend the $30 for another charger.

Fak dat,
He can get his own charger, i was just curious if it was something people have tried, if his goes dead he can have it then lol.

I would not do it, It is not worth the chance that you could have a prob so just pick up another one they are cheep.

quote:

ORIGINAL: sweetdeal

I have a battery tender, worked great last winter for storage, i removed the battery and brought it inside and hooked it up all winter, No problems,  My question is could you use a single tender in series to 2 separate batteries.

I am thinking as long as both batteries are charged and newer the battery tender can just send it's  "trickle" then it wouldn't cause much of a problem? I only see a problem if one of the batteries is older and doesn't hold the charge and would cause the tender to go into charge mode more often than it should? opinions?

You can buy a Battery Tender that has two negative and two positive cables for charging two batteries at the same time. Very inexpensive and worth checking out.

I did not know they had that.  Sweet    I have the tender hooked to my battery all the time with the screw down and I just plug the bike in when in storage.  

Here is a link to Battery Tender's website. The cost is $119.99.

http://batterytender.com/product_info.php?products_id=55&osCsid=9f4443d5dcd94215a8fbcd0d8b587e61

I've got 2 bikes and one Battery Tender. I just leave it on one for a while then switch to the other one.

Good point! You can do that too.