Use LiMn IMRs?
All my batts, I check with DMM after every discharge and another time recharge cycle. The DMM is always just beside my PC, and the alu boxes which stores all the lasers, flashlights are beside the PC. I have never skipped this stage, even with my NiMH and SLA. I rely on NiMHs and Li-ion professionally for one of my incomes (photography). Even with 3 digital bodies and 9 Li-ion, you can suddenly run out of power due to a simple "mistake" and on a very demanding shoot (say you are relying on a power sucking body/lens with stabilisation and always AFing and LCD chimping....or some videographers use them to take video which really impacts battery power). I really want to carry the charger, but my darn bag is really too packed.
With Nikon original Li-ion packs and Nikon charger, the LED could stop blinking indicating a full charge, and yet when you measure it the thing isn't fully charged. You can see the same thing in the cam, like 70% full or something. This happens with the older cells....but you still can use the cell.
If you will, having a backup for the backup for each of the bodies including the backup for the backup body, still does not mean that the setup is 100% foolproof. When i was younger with more energy, there was once in 4 consecutive days during a date period which was extremely popular for weddings, I did 4 full day weddings (ie morning session and then be back at night for the dinner) with 1 x short 2-hr solemnisation session squeezed in for the afternoon. You don't even have time to charge them up. LOL!
CPF's Throwjunkie measured 2.9A at the end with IMRs. That's nearly 9A at the emitter before losses.