m1k3y Posted August 30, 2009 Share Posted August 30, 2009 http://www.instructables.com/id/Rework-a-U...ssive-Capacity/ Those UPS devices you buy for your computer usually have a gel-cell battery that lasts for a few years. Less if your power goes out a lot. When you replace them, you pay a bundle, even if it's a standard cell. This short Instructable will demonstrate how to rework an older UPS for more capacity with cheaper battery power. The picture shows some sample UPSs and an example of the gel cell from one of them. The UPSs come in various capacities and, although you can boost the capacity, the output power is fixed. When you start out, make sure that the UPS you're going to modify will provide the volt-amps and power that you need. Also note that the volt-amp rating is higher than the power rating. The difference is because AC powered devices have a power factor. Check online for more info about this. Another, similar Instructable, also warns against trying to max out the capacity of your UPS because some use transformers that will run continuously at the rated output. It really depends upon the quality of the UPS, but plan to run at not more than about 75% of rated output capacity. Another thing to consider is whether or not your scrap UPS has AVR or Automatic Voltage Regulation. You'll want this if you can find it.... Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted August 30, 2009 Share Posted August 30, 2009 Need to keep that is a very well ventilated area as car batteries off gas over time. Quote Link to comment Share on other sites More sharing options...
DaPoets Posted September 1, 2009 Share Posted September 1, 2009 http://www.newegg.com/Product/Product.aspx...N82E16842102070 This is what I use. Quote Link to comment Share on other sites More sharing options...
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