FS7: Storing Sony Batteries

[karma17]

So far, I have just been using the Sony BP batteries for the FS7, and want to store them for maximum life.
The manual says:

• If the battery pack is to be stored for a short period
(approximately more than 24 hours and a month or less),
discharge the battery pack to 90% of its full capacity to prevent
deterioration of battery pack’s internal cells.
• When storing the battery pack for an extended period (more
than a month), it is recommended that you discharge the
battery pack to about 50% of its full capacity. (The two LEDs
light up green at this time.) While the battery pack is stored,
charge it until the capacity reaches 50% once in 6 months.

Judging from this, it sounds like you could damage the battery if it discharges completely.
And if that's the case, then you'd want to keep an eye on them even if they are in storage,
correct?

I didn't realize this initially and let one of the batteries drain completely and hope I didn't damage it.

Thanks!

 

[Clermond]

I never have gaps of a month or more in which I do not use the camera and the batteries.
I charge my batteries after the job and don't care about the rest. Done.

 

[Publimix]

Never had a problem with the sony batteries, I keep them charged all the time.

But battery management is a concern, so many types with different ways to store or load, unload etc.

I don't use my DJI every week and these batteries have be taken care of. In the military and aviation batteries have a logbook, maybe time for an App?
After a quick battery inventory I counted at least 15 expensive batteries worth a $1000 or more. And I think my collection is very modest compared with most of the users here.


Gopro- 3x
lumix g7 2 x
FS7 3x
lights 4 x
pan tilt head 1 x lead accu
DJI 3 x
dozens of AAA rechargeable batteries
USB power bank 1x

 

[Paul F]

Judging from this, it sounds like you could damage the battery if it discharges completely.

I didn't realize this initially and let one of the batteries drain completely and hope I didn't damage it.

Rechargable batteries don't like to be in a discharge state. The deeper the discharge, and the longer it stays in a discharge state, the shorter the life of the battery. The more it is discharged and left discharged, the quicker it wears. If a battery is left on to a complete drain, and left that way, real damage happens. Do that to your car battery and it won't last long.

Most modern battery systems prevent you from doing this. They only allow you do drain to a safe level. Each rechargable battery type has its own characteristics and has different needs in regards to how they should be treated. The manual is providing you with optimized guidelines for your battery type. Who knows how much life you are adding to the batteries by following the recommendations. It can be significant depending on how you use the batteries.