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Battery life
Posted: Thu Jul 18, 2019 12:30 am
by Ragnar
Hey gents need Halp! Lol can anybody say what the life expectancie of the Li-ion 7.4 battery supplied with the Heng long tanks is.
Right now been running my P3 with my great grand granddaughter and noticed it’s shutting down and needing restarting every couple of mins. Usually last at least 30 to 40 mins but haven’t run it in close to a year. OR could it be the 6 AAs are running down in the controller.?
Re: Battery life
Posted: Thu Jul 18, 2019 1:28 am
by Son of a gun-ner
Sounds to me like your 7.4 battery isn't charging, or not holding a charge.
If your controller AA batteries were dying, I don't think the tank shuts down

Re: Battery life
Posted: Thu Jul 18, 2019 1:55 am
by Ragnar
Aaaaah jeez this is just ******* nuts
Patients one must learn grasshopper!
Re: Battery life
Posted: Thu Jul 18, 2019 1:57 am
by Ragnar
Pretty much what I thought, thx sog
Re: Battery life
Posted: Thu Jul 18, 2019 2:17 am
by jarndice
Hi,
I agree, Are you using the Heng Long charger or an after market one ?
If it is a Heng Long charger then I suggest you invest in a decent Charger from the likes of Hobbyking ,
It will charge quicker and more safely and have the ability to charge Ni-MH/Ni-Cad/Li-Po and Li-on Batteries,
As to the AAs in your transmitter you can with very little work substitute those for a rechargeable Li-Po pack.
Oh and when you press "Submit" give it a minute, it will download even if it seems to take forever.

Re: Battery life
Posted: Thu Jul 18, 2019 5:36 am
by RenoirLV
A balance charger is needed to keep the battery in good condition for years. Stock chargers don't balance cells and one of them may get damaged. Mine is ok after more than 2 years. Runs the tank for 30 min.
Sent from my POCOPHONE F1 using Tapatalk
Re: Battery life
Posted: Thu Jul 18, 2019 10:22 am
by Son of a gun-ner
Ragnar wrote:Aaaaah jeez this is just ******* nuts
Patients one must learn grasshopper!
I don't know how you're doing it. But this last duplicate thread was posted an hour and a half later.
Re: Battery life
Posted: Sun Jul 21, 2019 4:48 am
by Ragnar
Son of a gun-ner wrote:Ragnar wrote:Aaaaah jeez this is just ******* nuts
Patients one must learn grasshopper!
I don't know how you're doing it. But this last duplicate thread was posted an hour and a half later.
Just plain f*******g talent I guess!!

Re: Battery life
Posted: Sun Jul 21, 2019 9:40 am
by Black Knight
+ 1 for the crappy charger issue
I threw away two (!!!) batteries because they wouldn't charge properly - I assumed they were "snide" copies instead of pukka decent ones! The third one I bought wouldn't charge properly either so I looked at geting a half-decent charger. Cost less than half the price of the batteries and worked a treat!