Regarding battery tenders...there is a fine unit available at WalMart. Made by Schumacher and costs only about $18 US. If you have Wallyworld in Canada the price should be comparable. I have three of them and keep my old car batteries fully charged through the winter when the cars are in storage. FYI, I checked available equipment at local parts houses and found a nearly identical unit at the Checker Auto...$45!

230/8