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Hello.
An update. Everyday, I get around 3 hours of electricity drop-outs regularly. The peak that the battery reaches is about 13.8 volts. Is that OK, or should I try to lower this voltage further?
Ah! I get it now. I actually removed the fan that's cooling the wall wart (in the picture I posted earlier), and that may be contributing to the higher voltage to the battery. I'll reattach the fan or another load, and then check the voltage after a few hours.
Good advice, I'll try that. I have several 2 watt 2 ohm resistors lying around, I'll try splicing them in, and see if that makes a difference.
And does H2 outgassing occur even with SLA batteries?
Here's the battery I'm using:
**broken link removed**
Hello.
Just thought I'd update this post with what I did.
Didn't make any charging circuit or anything.
Simply hooked up both routers directly to the battery, and connected a 12 V unregulated wall wart to the battery terminals with a diode in between. The battery idles at 14.4-14.8 volts and...
Oh, OK. Well, once I've set it all up, I'll report back whether I'm experiencing isolation issues. It's unlikely though, since the routers don't have metal bodies (they're regular plastic-body routers).
If anyone has other improvements in mind, I'd love to hear them.
Oh! Thanks KlausST. Would that be solved by installing two lm7809's regulator circuits to the battery and powering the devices separately?
And would isolation be that big of a problem anyway?
Greetings.
Sorry for the weird thread title, didn't know how else to explain it :P
I've recently been pretty annoyed by power outages in my area, and that's what prompted me to install a backup power source for my router and modem.
1) First off, the modem and router are each rated for 600 mA...
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