New UV-82 "large" batteries

[sefrischling]

I keep a few UV-82s, with the UV-5R, around for some secondary monitoring and more often than not, to hand off to Boy Scouts before they go walking in the woods.

The UV-5Rs all have the extended batteries, and now the UV-82 has an extended battery ... has anyone tried the extended UV-82 battery? I can't find any real info on how much life it actually adds to the radio or the size of the battery. The photo gives me some idea, but specs tend to be nice.

 

[billy1962]

I keep a few UV-82s, with the UV-5R, around for some secondary monitoring and more often than not, to hand off to Boy Scouts before they go walking in the woods.

The UV-5Rs all have the extended batteries, and now the UV-82 has an extended battery ... has anyone tried the extended UV-82 battery? I can't find any real info on how much life it actually adds to the radio or the size of the battery. The photo gives me some idea, but specs tend to be nice.

BL-8L 3600mAh UV82 Battery

According to Miklor - 3600mAh - exactly double the stock battery

 

[khaytsus]

Just make sure you buy from someone you can trust; there's a ton of fake baofeng batteries out there. Some are just a regular battery cell with lead weights in them to make them feel heavier, as crazy as that sounds.

 

[sefrischling]

Thanks. I picked one up from Baofeng Tech to see how they are. I'm looking for a battery that can last a Boy Scout 2 days out camping. These may work.

 

[rtorella]

Baofeng UV-82P Extended Battery

I just finished an inquiry with Baofengtech.com, who is an official USA Distributor. The 3600mAh rechargeable battery is Li-Ion and adds 1/2 more battery height to the radio. This will make the UV82 3" longer. This will be fine with my longer antenna, better balance. Won't be practical for pocket carry though with the longer pack. But the trade off is double the original factory battery. My original battery pack has a sticker that indicates 2800mAh. According to the USA distributor, it is actually an 1800mAh not 2800. They indicated the mfg intentionally mislabeled. My concern is the BL-8L 3600mAh Extended Battery has the probability of only being 2100 not 3600mAh as labled. Baofengtech.com sales dept assured me that the 3600 is actually 3600mAh. Based on number of cells, if the 3600mAh is double the original 1800mAh, that would need double the number of cells. Double the cells, would need to double the case size I believe. For $20.00 I will find out.

Here is the Baofengtech.com URL to the UV-82 accessories page. https://baofengtech.com/purchase

UPDATE: The battery pack is an actual 7.4v 3600mAh pack, works with the OEM desk charger and if mfg by Baofengtech here in the USA. The real deal. Photos of the battery on the radio are attached. Adds 50% more in height to radio. Looks good with the original antenna. I purchased a 15" dual band flex antenna as well. The extra 50% will better balance the radio with the longer antenna. Hope this helps.

 

[steve2001]

How long does it take to initially charge the extended battery? It took a little over five hours for my UV 5r.

 

[sefrischling]

How long does it take to initially charge the extended battery? It took a little over five hours for my UV 5r.

I stick them on a charger for a day and walk away.

 

[393Bird]

I was hoping that they had one of the plug in charging ports on them. I want to use them for extended hiking/camping trips, and charge a 2nd battery from a solar cell hanging on my back pack with the battery in one of the backpack pouches. Using one of those drop in chargers in the pack just would not cut it. If there is enough room in the battery, maybe I could add my own plug in? Any photos of the inside of these?

 

[Rred]

You can always add your own power connection, but these days most battery packs are sonically welded shut, which makes them sturdier, cheaper, and more water resistant but impossible to open without some cracking. That's just the way it is, you'd have to look over a new pack to see how well it has been sealed.

The alkternatives would be to get a copper of pieces of good "battery contact springs" from whatever source, or to make up a couple of tabs from beryllium copper or other good spring contact material. Attach them to a piece of plexi or wood so that they press against the normal charging contacts on the battery pack, and use a Velcro or elastic strap to keep the "board" and the radio connected. (Some "mobile" chargers simply run an elastic strap over the top of a radio to keep it held down firmly in the regular charger base.) The only problem with DIY charging on this, or any LiOn battery pack, is that you can easily damage the battery, resulting in fire or explosion, if you exceed the normal charging parameters. And since no solar panel is going to come "stock" set up to match a lithium battery pack...that might be something to be concerned about.
Might be simpler, cheaper, safer, to just carry a second battery for the weekend, unless you're comfortable with lithium charging issues.

 

[toastycookies]

If there is enough room in the battery, maybe I could add my own plug in? Any photos of the inside of these?

You would also need to add your own charging controller. You could try to scavenge the one from the drop in charger but I doubt you'll get it to fit in the battery pack itself.

 

[cmdrwill]

Do like we do, bring the drop-in charger with you. Most of the Bf chargers are 9 to 10 volts MAX input, check first.

 

[393Bird]

This is for a 2-3 month hiking/camping trip up the Appalachian Trail. Plan on having 1 extended battery in the backpack pouch with charge controller at 10v, fed from a solar cell on the backpack, into the extended battery. Should be able to swap the batterys out every 2-3 days. Not sure what would be easier, modify another battery with the port, or add a port to these? Have a few months to get it together.

 

[toastycookies]

This is for a 2-3 month hiking/camping trip up the Appalachian Trail. Plan on having 1 extended battery in the backpack pouch with charge controller at 10v, fed from a solar cell on the backpack, into the extended battery. Should be able to swap the batterys out every 2-3 days. Not sure what would be easier, modify another battery with the port, or add a port to these? Have a few months to get it together.

What model backpack? What does it have for a system itself. You may find it easier to get a small LiPO battery and use one of those chinese mini mobiles over the HT.

 

[Rred]

Simplest and safest, and probably cheapest solution?

Buy a second radio, which is about the same price as just buying an extra charger and battery, but gives you a whole spare system. Open up the second charger base, and you should find a really sparse circuit board that does all the charge controlling. I don't recall if the charger is designed for a 10v or 12v input, but a cheap 3-pin regulator chip can match that if required.

Then you've got a proper lithium charge controller that can run safely from a 12v solar panel. And, a spare battery. And a full set of spring contacts. Lots of ways to put it all together, cheap and quick and reliable. (Or sure, you could just buy a second charger base and cannibalize that, but given the prices for a charger versus a whole package...)

 

[Delta33]

I keep a few UV-82s, with the UV-5R, around for some secondary monitoring and more often than not, to hand off to Boy Scouts before they go walking in the woods.

The UV-5Rs all have the extended batteries, and now the UV-82 has an extended battery ... has anyone tried the extended UV-82 battery? I can't find any real info on how much life it actually adds to the radio or the size of the battery. The photo gives me some idea, but specs tend to be nice.

. Complete waste of batteries ...

 

[393Bird]

What model backpack? What does it have for a system itself. You may find it easier to get a small LiPO battery and use one of those chinese mini mobiles over the HT.

The solar cell will hang on the pack. It is a 12 volt 5 watt cell, that has both 12v and USB outputs. I want to put a extended battery and controller in the side pouch for charging while using the radio with a 2nd battery.

 

[toastycookies]

One of these connected to the 12v source would work with your existing drop in charger.

12/24V CAR ADAPTOR FOR UV-5R BF-F8 BF-F9 409shop walkie talkie- buy-two-way-Radio-Wholesale-retail