How long does fully charged backup battery stay charged?

Started Jun 28, 2012 | Discussions thread
psandham
Senior MemberPosts: 2,015Gear list
Like?
Re: How long does fully charged backup battery stay charged?
In reply to spedprof, Jun 29, 2012

These are Lithium-Ion (Li-Ion) batteries and have a self-discharge rate of approximately 5-10% per month at the very most so they should stay charged for months. I recharge my batteries on a monthly basis although sometimes I forget...never had any problems after two months or more of non-use. You should discharge them to about 1/2 if you are not going to use them for a while.

sources:
http://en.wikipedia.org/wiki/Li-ion

http://batteryuniversity.com/learn/article/how_to_store_batteries

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

-- hide signature --

pjs
'Consulting the rules of composition before taking a photograph
is like consulting the laws of gravity before going for a walk.'
Edward Weston

 psandham's gear list:psandham's gear list
Panasonic Lumix DMC-LX5 Nikon D200 Nikon D300 Nikon D700 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR +5 more
Reply   Reply with quote   Complain
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow