6 votes
Accepted

DC connector type for Baofeng UV5R base charger

The plug used in the Baofeng base is a 5.5 mm/2.1 mm barrel connector. However, you cannot simply parallel a bunch of base charger units and power them off of a single AC or DC adapter without ...
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  • 18.2k
5 votes

Can I have the Hytera PD785G turned on in the charger?

Never owned a similar device, but judging from the product pictures: Indeed, the charging logic for the battery is not inside the handset, but the charging cradle, and hence, that would quite likely ...
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4 votes
Accepted

Deep-cycle marine battery life question

When you parallel batteries, the combined reliability generally becomes less than the least reliable battery. In reliability engineering, this follows the equation: $$R_S=R_1*R_2*R_3 \tag 1$$ where $...
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  • 18.2k
2 votes

Is it safe to monitor a channel while charging my handheld?

Well, it's a commercial product, and I'd be very surprised would Yaesu be willing to deal with the anger if it wasn't safe to do something as obvious as that. Also, from an engineering point of view, ...
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2 votes
Accepted

Is it safe to monitor a channel while charging my handheld?

It's perfectly safe. Note that you will slow charging down, since you are using some of the battery's stored energy to monitor the frequency. A better solution might be to get a second battery for ...
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2 votes

Orange Goop Leaking from Power Supply

That's very unusual. Modern electronics do not usually contain significant volumes of fluid that could leak out like that. The most likely sort of leak one might find is an electrolytic capacitor ...
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  • 23.1k
2 votes

Deep-cycle marine battery life question

I'll bet those old batteries are just plain worthless. Based on our experience with many deep-cycle golf cart and automotive batteries, those 10- and 20-year-old batteries almost certainly are not ...
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  • 7,545
2 votes

power supply / LiFePo4 battery backup compatibility

One thing that works, though it may be a bit silly: use the "Solar" input of the Epic PWRgate instead of the "Power" input. The PWRgate's output voltage will come from the battery ...
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  • 9,255
1 vote

power supply / LiFePo4 battery backup compatibility

One option appears to be using a DC to DC converter designed for charging house batteries in RVs, which will automatically correct the incoming 13.8v to whatever the battery requires. There are some ...
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  • 381
1 vote

Orange Goop Leaking from Power Supply

Wall warts aren't terribly complicated devices, they're just small transformers to convert the commercial AC into low voltage DC. There won't be any batteries in it, but there are likely capacitors. ...
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  • 727
1 vote

Motorola XT180 not charging

I will answer the final question: "Should I return them to the store?" Yes. If they are still under warranty, return them and get a replacement. If the battery is a sealed unit inside, then opening ...
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  • 4,409
1 vote

UV-5R with 3800 battery... usb 5v to 7.4-8v charger

The two extended batteries I have (for a BF-F8HP, but as far as I know, this model uses the same batteries as the UV-5R) have direct charging input socket on the battery, separate from the contacts ...
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  • 3,891
1 vote

UV-5R with 3800 battery... usb 5v to 7.4-8v charger

The UV-5R has a nominal battery voltage of 7.4V and the supplied charger provides 8.4V with 600mA current limit. I believe this means the battery max charging voltage is 8.4 volts. Directly applying ...
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  • 1,022
1 vote

Is it safe to monitor a channel while charging my handheld?

The charging cradle is an external power supply that can power the radio and charge the battery at the same time. Yes, that is safe.
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1 vote

Is it safe to monitor a channel while charging my handheld?

It should be perfectly safe. I have done it for ages with my Yaesu FT60R handheld so yours shouldn't be any different. Moreover, some people use their handheld as a (semi-) fixed station using a power ...
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