Are These Batteries any Good for my EV?
by Bob
I'm looking at a set of Exide Marathon M12V90F 12V 90Ah Sealed Lead-Acid Batteries. The label says: "Applications include UPS, Telecommunication (Wireless, Cellular, Distributed Power, PCS, Broadband), Emergency Lighting, Utility (Switchgear Control Power), Railways". Will these batteries work in my EV? Hi, Bob! Well, it wouldn't be the first time somebody's put storage batteries in an EV, but they're not best. See, here's the problem: Those are REAL deep cycle batteries. Real deep cycle batteries are used for situations where you've got backup power for your house, or solar panels, and you need batteries to store the power. They are made with solid lead plates inside, and are designed to sit there undisturbed in the garage, taking and receiving power over and over. A car, on the other hand, is a vibrating, jolting, accelerating, amp-sucking environment for a battery. It requires a battery that's tough and light on its feet, and which can behave like a deep-cycle battery under adverse conditions. But the trouble is, we CALL these batteries deep cycle batteries - and they're really not. They DO deep-cycle, although not as well as your Exide M12V90Fs, but the battery you need is a compromise hybrid battery developed for golf cars that they nicknamed "deep cycle" to distinguish them from the "starting-lighting-ignition" type. The bottom line is, if you use storage batteries in your EV, plan to replace them ahead of schedule - they don't appreciate all the bouncing around. Regards, Lynne
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