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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 12-04-2016, 07:54 AM   #1
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Default Phantom 3 battery charging alternatives ?

I recently bought a DJI battery adaptor lead to fit my B6 LiPo charger. Basically the idea being that my 2 batterys could be cycled on the field to keep me flying by using car via ciggy socket to my B6 and the lead to charge a pack.

I have been told by DJI on their forum not to use the charger or lead ...........

OK - I'm not a newbie to LiPo's as many know on here - I am actually quite well versed in them having been a model flyer for over 50years and latter years a regular user / abuser of lipos ! I have over 50 current models with majority lipo powered from 1S up to 6S.

My question .... am I alone in using a non DJI charger to charge up DJI packs ? If I am not alone - what charger etc. do you use ?

I don't want to use an inverter by the way ... I have one to use on my yacht ... but prefer not to use for this ...

Nigel

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Old 02-14-2017, 08:04 AM   #2
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Default Charging Phantom Battery

I cant see why you cant charge this battery with the charger i use for my Planes and Helis, its just a 4 cell lipo (overpriced) there about 125 Pounds.

The only drawback would be it would not be balanced if you use this lead

http://www.ebay.co.uk/itm/2623737148...%3AMEBIDX%3AIT
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Old 02-14-2017, 09:03 AM   #3
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Some batteries have an inbuilt battery protection circuit that prevents over charging or over discharging and also balances the cells. This may be the case with the DJI battery?.. If so it may effect how you charge it.
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Old 02-14-2017, 03:11 PM   #4
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This thread should have been deleted really ... as i have moved significantly on from that first post.

The lead does exactly same job as the DJI supplied charger which is only a regulated Constant Voltage dumb brick in fact.
The Battery pack has the charge controller circuitry and its a pretty poor one at that to be honest.
At best it prevents overcharge ... it also provides the telemetry info via the second set of contacts for us on the ground. Discharge protection is 'subject to high risk of single cell over-discharge' if relied on and Balancing is near non-existent, (myself and others cannot find any point that the pack balances).

DJI support of course as per its reputation fails to answer any of the queries on it.

Nigel

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Old 02-14-2017, 10:35 PM   #5
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If you are feeling brave you could open the battery up and solder wires direct to the battery terminal thus bypassing the protection/charge circuit. Then you can charge and balance as per a standard LiPo.
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Old 02-15-2017, 08:37 AM   #6
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True - but once you see inside as I have done - its a bloody mess !! How DJI can put such a price on such shoddy work is unbelievable.
The balance lead is literally crammed in under the board pressing on various items ... the main lead is bent back so hard - made to preform a 180 in literally its own gauge.

The HV LiPo's used are strange square size. More like the old GE packs we used to be able to get. When we opened up a pack - we were looking to see if we could add leads / change LiPo etc. Yes you can - but not so easy.

Myself and B. plus others who did odd ... we tested various levels and aspects of the packs ... to be disappointed in so many claimed functions that failed to show. Balance of the packs being one.

Anyway - they work ... the charge lead from ebay is very good ... just wish DJI batterys were not so expensive for what is really only a Hv LiPo with charge / telemetry board strapped onto the front.

Nigel

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Old 02-15-2017, 09:41 AM   #7
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This is why I prefer to use my LiPO charger instead of the DJI dumb brick :



Nigel

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Old 02-15-2017, 06:57 PM   #8
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Many companies like to do this kind of stuff, to force you into buying their own overpriced parts. To them it's just a money game.
I hate companies that do it. I have made my own replacements more than once.

I had a friend that developed a throttle for the Cox .010
It was just a rotating sleeve, but he purposely made it so complex, that he claimed no one would try to copy him. He had about 30+ parts in it.

In the course of 10 minutes I sketched out a workable throttle with 1/5 the number of parts, and different enough that I would not have infringed on his patent. I didn't want to bother with it as good small outrunners were starting to come out. He claimed the Cox .010 would make a perfect power plant for a small military drone. 1 grain of sand destroys an .010

He did make and sell them, but less than 100 were ever made. His price was ridiculous.

Dave R, KI7MTA Proud PGR rider.
When you have flying skills like mine,
You become a master at repair.
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