Tadaaa wrote in post #14445311
I think it is just the battery type. I remember having new Lenmars for the 1D and they wouldn't last nearly as long if they had been off the charger for a couple weeks; maybe 300 shots. But if I charged them the night before I would get 700+ shots. These same problems were reported 10 years ago with OEM batteries.
It is the battery type. The NIMH chemistry has a pretty bad self-discharge rate. Through use, it starts to develop even worse high self-discharge. That's why you only get 300 shots to none from a full charge when the pack is dead.
Regular NIMH, the self-discharge rates are dependant on what kind of brand the NIMH cells are. Good brands such as Sanyo, Powerex, etc are QUALITY built NIMH cells.
Their self-discharge rate is very good compared to cheap unbranded chinese cells, which is what I believe to be in these NP-E3 packs.
The Lenmar pack I modded, inside were 1700mah green factory chinese cells. I'm sure the cells are built okay as 1700mah is not a lot of power for 1AA cell, that's why the Lenmar pack lasts as long as the OEM Canon cells.
Now, LSD, Low Self-Discharge NIMH are a different kind of NIMH chemistry cells. They keep their charge for a very LONG time.
The first LSD NIMH cells were able to keep 80% of their charge after 1 year.
The new generation of LSD NIMH are able to keep 80% after 3 years.
The regular NIMH batteries self discharge when they're not being used, which is why users say their battery packs don't last long, but they get 700+ shots off the charger.
Mod the pack with LSD cells, and you'll be able to pull 1000+ shots on the new LSD pack day after day without needing to charge.
Mod the pack with high capacity NIMH cells such as 2700mah Sanyo, or 2700 Powerex cells, and you'll be able to take photos like no tomorrow.