Replacement battery for 7Ah power tanks

[BinocularSky]

When, after a couple of years, the low-quality battery that typifies 7Ah "power tanks" no longer holds a decent amoutn of charge, changing the battery can give it a new lease of life.

I've recently done this, and am impressed by how much better it is than even when it was new. The battery I used is a Yuasa NP7-12 12v 7Ah battery, a deep-cycle battery sold for alarm systems. It's a perfect fit in the "power tank" case; just needed me to cut the ring terminals of the battery leads and crimp some spade termnals on.

£16 and half an hour.

[Gina]

I use the same batteries in my UPS

[BritAngler]

22AH replacement battery for power tanks, all you need to do is widen the hole in the connectors to fit....

http://www.amazon.co.uk/dp/B00J4SNYGG/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=28BFQJBRM188O&coliid=IUAK517H5PRSB

[keithatrochdale]

Or even better price delivered;

http://www.ebay.co.uk/itm/201048264781?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And a known make!

. 

[BinocularSky]

Unfortunately the 22Ah one is a tad (*) too large for the 7Ah "power tank".

However, while looking for the dimensions, I found this site where the Yuasa is a lot cheaper than the one I bought:

http://www.rapidonline.com/electrical-power/yuasa-np-series-np7-12-sealed-valve-regulated-lead-acid-battery-sla-12v-7-0ah-18-0635

(In case anyone is thinking of doing the replacement)

For very large values of "tad".