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Reviews (1)

Mar 31, 2021
GB20 very good for 3.5l
1 of 2 found this helpful This product works fine on a V6 3.5l Toyota Sienna with a 10 year and a half old battery (more than 120k miles on the same battery). The battery is old and could not start the car after a week or so in the garage. GB20 has to charge 30s or more before cranking the engine and then it starts right away. GB40 might be more reliable for a really bad battery for this engine size but for a battery starting to fail, GB20 is perfect at least while it's new as mine is. I think I've already used it about 5 times and the charge level is still on green (75-100%) given that I don't think I've charged it to 100% to begin with (green light was still blinking). I've read somewhere that the jumper starter lasts longer if not kept at 100% all the time. It gives me some freedom before I buy a new battery after I make sure that this one is too much of a hassle.