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18650 battery test in Xhdata D-808 radio


Steve Ratzlaff
 

I greatly enjoyed the previous comments about battery life in the Xhdata D-808 radio and how battery life varies so much and was motivated to run some tests of my own.

I ran some tests on my own various 18650 batteries. First I found the radio battery indicator would flash and the radio would not stay on at 3.403 volts, indicating I should test batteries with a load simulating the radio until they were discharged to about 3.40 volts. I found the radio tuned to a station, backlight off (the light greatly increases current draw), with low to medium volume drew about 50 mA and used that current for my test. I used two 150 ohm 1/4 watt resistors in parallel with an on/off switch to give such a load across the battery, tested outside of the radio of course. I bought four new Samsung "36G 10A 3600 mAh" batteries off eBay, charged them one time initially for the test. Those four batteries all lasted over 52 hours with the 50 mA load before dropping to 3.44 volts where I stopped the test for those batteries. The 2000 mAh battery that came with the radio, which I did not recharge after it had been charged maybe 6-8 months previously and taken out of the radio and let sit (its no-load voltage was 4.079V) lasted 28.5 hours. A Tecsun-branded 2000 mAh battery, also previously charged and let sit 6-8 months earlier, with no-load voltage 4.179V, lasted 31 hours and 15 minutes. Two old "GTF 9800 mAh" branded batteries that I'd used in flashlights were much poorer; both lasted only 11 hours.

The Samsung 3600 mAh batteries gave very long life but they are not inexpensive, almost $10 each with shipping and tax. Maybe other brands of 3600 mAh batteries would work similarly but I can't say.

73,

Steve


Steve Ratzlaff
 

Reading my comments, it might seem that I put the on/off switch in parallel with the load resistors but that is not so--I put the switch in series with the load resistors (which were in parallel to give the 50 mA test current) so I could connect this setup to the battery and turn on the switch to start the load test, and turn off the switch to stop the load test once the batteries had dropped down to approximately 3.40 volts. I hope no one is still confused!

Steve

On 7/31/2020 6:45 PM, STEVE wrote:
I greatly enjoyed the previous comments about battery life in the Xhdata D-808 radio and how battery life varies so much and was motivated to run some tests of my own.

I ran some tests on my own various 18650 batteries. First I found the radio battery indicator would flash and the radio would not stay on at 3.403 volts, indicating I should test batteries with a load simulating the radio until they were discharged to about 3.40 volts. I found the radio tuned to a station, backlight off (the light greatly increases current draw), with low to medium volume drew about 50 mA and used that current for my test. I used two 150 ohm 1/4 watt resistors in parallel with an on/off switch to give such a load across the battery, tested outside of the radio of course. I bought four new Samsung "36G 10A 3600 mAh" batteries off eBay, charged them one time initially for the test. Those four batteries all lasted over 52 hours with the 50 mA load before dropping to 3.44 volts where I stopped the test for those batteries. The 2000 mAh battery that came with the radio, which I did not recharge after it had been charged maybe 6-8 months previously and taken out of the radio and let sit (its no-load voltage was 4.079V) lasted 28.5 hours. A Tecsun-branded 2000 mAh battery, also previously charged and let sit 6-8 months earlier, with no-load voltage 4.179V, lasted 31 hours and 15 minutes. Two old "GTF 9800 mAh" branded batteries that I'd used in flashlights were much poorer; both lasted only 11 hours.

The Samsung 3600 mAh batteries gave very long life but they are not inexpensive, almost $10 each with shipping and tax. Maybe other brands of 3600 mAh batteries would work similarly but I can't say.

73,

Steve


Phil Pasteur
 

Thanks for doing the testing Steve. It confirms what I have  experienced  with some of the specific batteries that you tested. It also confirms what I have  read and would have expected about the super rated Chinese cells.


radiojayallen
 

I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


Rémy Friess
 

What sort of battery is it?

My D-808 came with a 2000 mAh type. A friend of mine got a set with a 1600 mAh type, another with a 1200 mAh, and it seems some come with 3600 mAh batteries.

It seems they include the type of battery they can lay their hand on when dispatching the stuff.

Rémy.

Le 02/08/2020 à 14:37, radiojayallen a écrit :

I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


radiojayallen
 

Mine is an XHDATA labelled cell rated at 2000 mAh.


Mark Roberts
 

I have two D-808's and they show somewhat different results. It's true that they now have different batteries as well, but the radios behaved differently even when they had the same type of battery.

The two D-808's came from the same Israeli reseller, about a couple of months apart.

There are so many variations possible that it seems challenging to design a good experiment that would help clear the matter up.

I just got a Tecsun ICR-110, which uses the same kind of battery, possibly to power a 3-watt amplifier (very beefy sound on this one, not like the other Tecsuns I've had). The charge indicator is very different from other radios I've had. It will be interesting to see how long its battery lasts in service.


Kenny Murray
 

I avoided using the 18650's because the radio i choose was the tecsunpl365 and uses aa batteries. i use 3 aa duracell 2500mah batteries.. no complaints with anything...

having said this.. research with rc models.. portable radios. ect..

avoid the belief of over ratings of many products such as 18650 batteries.

what is good is this.. the ones from LG and the pnes from panasonic..

simple place to get them.. go to a smoke shop.. they sell them to use in smoking vaporizors.

i have a countycom gp5ssb.. i use aa batteries.. as duracell.. nimh

* i was previous use many batteries of energizer.. and i sopped doing so.. they are not good batteries any more and warranty for such products is very poor.. i used 8 in an avation radio.. cycled maby 12 times over 4 years.. occasional standby usage.. there was defects in 2 of the batteries.. two sets of 4.. a cost of 50$.. energizer offered 5$ coupon. waste of time..

ask anyone who has a vape unit.. what is the best battery..

thats your answer for your radio.. rc toy.. laptop rebuild. HT radio pack..

they will tell you LG and panasonic.. as for the specific brand.. they have the battery in the sales at the smoke store.. the one that sells vape items..

it is a vape battery you want.. it is the same as your radio..




best wishes..


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On Sunday, August 2, 2020, 9:37:37 AM ADT, radiojayallen <radiojayallen@...> wrote:


I've been interested in reading about people's varying experiences with battery life on this radio. Since I had never noticed a problem with battery life on my XHDATA D-808 with its original battery compared with other rechargeable radios (although it is one of many radios I regularly use in rotation so it's hard to judge), I am running an informal real-world test.

I charged the radio, then started using it for two hours a day on AM at medium volume with the light off. So far I have completed two weeks (14 days) which would amount to approximately 28 hours and although the battery meter initially drops rapidly it is still showing 2 bars. I will report total hours when it finally shuts off, but it seems clear that people are having vastly different results. Of course if I were playing it more loudly it would have certainly been depleted by now so there is a bit of subjectivity to this. But at least compared to other radios with internal rechargeable batteries the D-808 with it stock battery seems fine.

FWIW.

Jay


Max Italy
 

@ Rémi Friess the battery in my D-808 is Xhdata branded 2000mA

https://i.imgur.com/rFpmUrb.jpg

@ Kenny Murray i use vaping gear and i have a lot of 18650 batteries but keep in mind that most vaping gear (if not all) use flat-top batteries while you need button-top.
Flat-top batteries are shorter and you can adapt them using one of those Neodymium magnets sold on ebay or aliexpress , see  https://www.ebay.co.uk/itm/321296194078 or https://www.aliexpress.com/item/32792488474.html

The good point is that vaping gear draw a lot of current and use batteries rated 25A minimum; most are rated 35A. You do not need high current batteries for your radio, you need high capacity, however you can be sure that  if the battery is good for vaping it is good quality (still need the magnet extension) or it will not work at all.

In "normal times" quality batteries can be purchased online for less than $3 each from China including shipping but nowadays with Covid-19 most sellers apply huge shipping charges.
I use these for my vaping gear https://www.aliexpress.com/item/32821524948.html  and they are as good as the famous brands.