What's the issue with P4 batteries?

LZJ

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I've had a P3se for years and have accumulated both newly purchased as well as several used batteries for it and NONE have ever become swollen or failed like the batteries for my P4p.... Some of those have literally swollen after only a couple flights. The added expense and worry about P4 batteries is a joke. I'm just about ready to dump both of my P4 birds on Ebay and go solo with my P3se. I believe the P3 se has a greater overall flight time as well in comparison after using both side by side. No doubt it has something to do with all the sensors pulling power etc. Everything for the P3 se is cheaper as well. My conclusion, its no different than buying a stripped down car with fewer options, LESS THINGS TO FALL APART, BREAK AND FAIL.
 
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LZJ

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and I didn't even mention very poor battery fitment on the part of the P4 as well... I've never had the P3 se battery become dislodged or fail to set properly. during or prior to a flight, snaps right in and is always easier to extract..
 
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Have you been buying your batteries directly from DJI? The battery is a critical (and expensive) part, so I never purchase them from a third party website. Same with props. Honestly, I've had my P4P and 5 batteries for several years now and have never experienced the problems you describe. Maybe I'm just lucky.
 
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LZJ

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Excellent point. I've tried a hodge-poge of batteries to include cheaper after market ones as well as high dollar DJI's but have had trouble with all of them. Tired of hoping for better luck. But in contrast again with the P3 se's I'm really wondering if there's a physical developer issue here related to the amperage, volume, discharge rates etc that make them seem much more prone or susceptible to failure and shorter operating life in my experience... Wish I could trade them in like pop bottles for a refund...
 
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Capt KO

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I would agree that the system could have been designed a bit better.
I’ve learned that with the P4 models, checking to insure the battery is locked is a MUST.
Agree, check then check again. I never trust the push and go method. Using 2 fingers top and bottom works better but still look at the bottom to confirm it's tight. The swelling is still a concern with all brands, incl oem.
 
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I’ve had 3 p4 pro batteries swell up in about 3 years. 1 per year, usually the one I used the most I’m guessing. I never go below 30% either…
 
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I have 4 batteries and one which froze - it didn't want to recharge any more.
It was one of the two batt. which came with the P4P+. Generally, they worked normally for about 4 years then one froze and one still make nearly 18 min. of flight time + 25% left.
The newer ones work fine and with no problems make 25 min. of flight time + remaining power. Never swollen. Checking if the battery is locked is really one of the most important steps before the flight. I usually push it in to hear the lock sound but many times after doing that the bottom edge of the batt. is not in the position. If so you need to push again the lower part of the batt with two fingers - one up and one down of the cover so the bottom edge klick and properly fix inside. This I think is enough secure.
Only one fast push into the drone is not always enough and if I haven't been doing the second check the drone would probably fall down. This is a simple but important check before each flight.
I don't know what is happening with your batteries. Certainly not normal.
 
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Have you been buying your batteries directly from DJI? The battery is a critical (and expensive) part, so I never purchase them from a third party website. Same with props. Honestly, I've had my P4P and 5 batteries for several years now and have never experienced the problems you describe. Maybe I'm just lucky.
I trust third parties such as B&H. That's where I got the P4P and extra batteries. All are healthy and recently manufactured.
 
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Echo what others have said about double checking the P4 battery is properly clicked in place - it's the last thing I check before powering up!

I've been using my P4Pro for agri/mapping work for 4 years, still on original batteries (approx 70 cycles) but I do look after them. Most flights never below 30%, never charged when hot, storage charge on hub when not using them and I make sure the connectors on batteries and drone are clean (no dust,etc).

Mapping flights tend to be smooth, slow (not 'hot rodding' about the sky) so maybe my batteries have had an easy life :)

Adam
 
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I have seven DJI P4P OEM batteries I've sidelined because of swelling and difficulty removing them from the aircraft immediately after flight. Their cycles have ranged from 45 to 65 before swelling and I grounded them to err on the side of caution. But I have never had a performance or operational issue or severe cell voltage deviation with any of them. I naturally wish they lasted longer, but I fly primarily in Florida where I attribute their early demise to the regularly 90°+ hot temperatures. This taught me to fly the dark heat-absorbing Obsidian model in the cooler months, and fly the white sun-reflecting model in the warmer months - which is most of the months now. I expect there is a correlation between ambient operating temperatures and battery longevity.
 
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LZJ

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Great observations. Interestingly I have never had a p3 battery swell or fail to recharge or develop a weird pattern of flashing LEDs and no longer charge either. I've gone well beyond 65 charges with some P3 batteries. I think the p4 has some developmental, power, heat, physics, or less likely planned obsolescence issues that limit it in my opinion for durability, cost and reliability.
 
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It's why I reluctantly sold my P4P to a surveyor.
I got tired of feeding it batteries.
Strangely enough I had one PowerXtra aftermarket that never gave me a problem and was the only one left out of 4 batteries.
All the DJI batteries swelled up and became impossible to insert and remove.
 
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