Pat Slater Posted April 14, 2014 Report Share Posted April 14, 2014 I use 95Wh V-Lock batteries to power my 633 and noticed that when I had 14V Li-ion selected on my 633 I was only getting down to 2 status lights on the battery before the 633 warned of very low battery. I have recently selected 12v on the power selector and get more run from the batteries. Had an on set discussion with fellow sound op about our bag batteries, and he suggests that I am treating the batteries harshly and damaging them. I don't see the camera ops changing out their V-Locks until they are down to 1 or no lights. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Boomboom Posted April 14, 2014 Report Share Posted April 14, 2014 I think li-ion batteries don't like to be drained down flat. Anyway, I always switch mine at probably half to 2/3 down to top them up. On my 788, something like around 13.2v; I don't like to go down to the ''twelves''. With my 302 it will last forever so it's not a probelm. With my soon-to-be 633 I'll do the same as with the 788 In ''lights language'', I noticed that on my 3-LED NP1s, it's usually 2 lights still on Seems to work since I got NP1s from 2007 still delivering A1 power (IDX). Quote Link to comment Share on other sites More sharing options...
studiomprd Posted April 14, 2014 Report Share Posted April 14, 2014 pat: " when I had 14V Li-ion selected on my 633 I was only getting down to 2 status lights on the battery before the 633 warned of very low battery...selected 12v on the power selector and get more run from the batteries. " I'm not sure I understand.. you actually get more run time before they die..? or are you just reading meters vs lights ?? If you select 12V, the metering will read a 14V battery as "stronger" for longer... Quote Link to comment Share on other sites More sharing options...
jason porter Posted April 14, 2014 Report Share Posted April 14, 2014 I don't have any facts on Li-Ion "camera" battery care, but I know that a lot of batteries that come out from rental houses (around here) are crap and go flat with little notice. Quite possibly from improper usage and abuse. Quote Link to comment Share on other sites More sharing options...
berniebeaudry Posted April 14, 2014 Report Share Posted April 14, 2014 The batteries have built in protection circuits designed to prevent over charging, and they have a set cut off voltage that will shut the battery down before it goes below a certain voltage value. I don't know if consistently running one to the point it shuts off is good practice or not. I know they have a finite number of charge cycles and you would think if you didn't let them go lower it would mean more overall charge cycles. Maybe its a trade off between the two. I would like to know too what the best practices for Li-ion, Li Polymer batts are. Quote Link to comment Share on other sites More sharing options...
Soundwil Posted April 14, 2014 Report Share Posted April 14, 2014 Pat Have a look at the graph below. It shows an NP1 (pretty new) Li-ion battery under test in my DEVA. It shows a steep fall-off after about 12.9Volts which I think is typical for Li-ion NP1s. The 633 may be setup so that it gives you a warning well before this voltage is reached - maybe? Quote Link to comment Share on other sites More sharing options...
fatfatjames Posted April 22, 2014 Report Share Posted April 22, 2014 The sd633 does not like anything under 10.4v Sent from my iPad using Tapatalk Quote Link to comment Share on other sites More sharing options...
soundslikejustin Posted April 22, 2014 Report Share Posted April 22, 2014 The sd633 does not like anything under 10.4v Sent from my iPad using Tapatalk Neither will your 14.8v Lithium... Quote Link to comment Share on other sites More sharing options...
fatfatjames Posted April 23, 2014 Report Share Posted April 23, 2014 I was using a 12v Li - ion. With 10.4v nomad is still happy running with 3 srb... Sent from my GT-I9505 using Tapatalk Quote Link to comment Share on other sites More sharing options...
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