Steve's Blog

Supercharging my UPS

I hope the charging circuit doesn’t melt when it has to recharge the higher capacity battery.

I’ve had a 600VA UPS forever. Surge protection for my modem / router (I’ve had to replace one after a lightning storm even though the whole estate is on underground phone and power). Surge protection for whatever I plug into it.

As a bonus, when power fails, my router keeps working, so does my laptop under its own battery power, hours of internet fun in darkness. My energy monitors are plugged into it too. ( When power fails my usage is zero, but a lot of zero’s look better than nothing, i.e. A gap in the data). The original battery in the UPS was getting past its use-by date and the back-up time was getting shorter and I didn’t want to have to pay for another cheap UPS (or battery) so I used a perfectly good battery I had at my disposal.

But the battery I had was 17Ah, a little larger than the 7Ah battery that is included with the UPS. So I removed the OEM battery, extended the leads and hooked them up to an external battery. (Did I mention I hope the charging circuit doesn’t melt when it has to recharge the higher capacity battery? Floating is OK and running it down to 50% is ok, I’ve not tried more than that. If it fails, I’ll buy another cheap 600VA UPS (<$70AUD)). [caption id="attachment_379" align="aligncenter" width="300" caption="Supercharged UPS"][/caption]

Tags: Backup, UPS

1 Comment to Supercharging my UPS

1. 

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William on January 21st, 2025

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