Question about Jet 3 Ultra Power Chair

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Battries are discharged and now charger does not operate

Ultra Jet 3 has had little use and was battery charger was operating properly. The batteries got discharged and now the charges does not seem to come on. Operater manual states that 'if battery gets fully discharged the charger will not operate, call the supplier'. Called the supplier and all they could say was 'bring it in'.

How can I test the charger or get some charge into the battries so that the charger will work again.

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The batteries will discharge below the reference voltage required for the charger to "see" the batteries if left uncharged for more than a month or more. You have to carefully bring the batteries back up to about 12 volts each for the charger to see them. The easiest way is take them to a qualified battery shop that has a step charger for sealed batteries. If you attempt to use a car charger on sealed batteries, you will ruin the batteries or even blow them up as the cases are sealed and the gas from charging has no way to escape. Some people have used a standard car battery charger on low only, applying a charge to one battery for about 15 minutes, then the other for 15, etc. until the batteries are back up to 12 volts, but again, using a car charger is dangerous and could cause the battery to explode.

Posted on May 23, 2010

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I shocked a battery using a car battery charger the other day - it definitely works :) Finding the Best Place to Buy Car Battery TopToolAdvisor

Posted on May 23, 2018

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