buckshot164
Well I learned a lot about this subject the hard way.  When you buy 18650 batteries the batteries can be button top or flat top.  Well if you use the wrong holder you could find that things do not work right.  I used a holder that the wire went inside the holder.  The connector would keep the top of a flat battery from making contact.  So I changed all my holders and the new holders are great.

The first link is the holder not to use.

http://www.ebay.com/itm/R6H1-Single-Slot-1x-18650-Mobile-Battery-Case-Holder-Box-with-Wire-Leads-DIY-/122170968296?hash=item1c71f508e8:g:co4AAOSwOyJX9zYN

This is the type of battery hold I like to use.  Now these battery holders can be different so be careful.  If buying a multiple battery  holder they can be in series or parallel.  These are the best.  You can also bridge with a fusable link or wire that will burn out at above 6 amp for fire protection.

http://www.ebay.com/itm/Useful-5-Pcs-Plastic-2-x-3-7V-18650-Batteries-4-Pin-Battery-Holder-Case-fb-/122257452350?hash=item1c771cad3e:g[tongue]xMAAOSw4GVYRwJI

http://www.ebay.com/itm/DIY-Black-Storage-Box-Holder-Case-For-3-x-18650-3-7V-Rechargeable-Batteries-top-/381906035823?hash=item58eb5fa46f:g:EVcAAOSwHoFXud18

http://www.ebay.com/itm/1x3-7V-18650-Battery-2Terminal-Open-Holder-Case-Storage-Box-Wire-Leads-Connector-/311755253374?hash=item48960fa67e:g[biggrin]NsAAOSw4GVYUX2E

http://www.ebay.com/itm/Black-Plastic-Battery-Storage-Case-Box-Holder-For-4X-Rechargeable-18650-3-7V-DIY-/131558894255?hash=item1ea1856aaf:g[tongue]CUAAOSwjVVVqQdG
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coyote08
I like using the holders you first posted that you dont like, lol.  I need to use protected holders since I'm using unprotected 18650 cells from laptop batteries.  I follow the link below to make protected holders. This is cheaper then buying protected holder.  I'm assuming since you're using unprotected holders, you're using 18650 cells with protection.  

http://www.instructables.com/id/Build-protected-Lithium-battery-holder/
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buckshot164
You don`t need protected batteries if you use a fuse link between the batteries and power source.  Look up power wall.  The holders listed first work good on button top batteries.  I using laptop batteries in the first holder how do you ensure the battery touches the holder contacts.
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wvridgerunner
buckshot164 wrote:
You don`t need protected batteries if you use a fuse link between the batteries and power source.  Look up power wall.  The holders listed first work good on button top batteries.  I using laptop batteries in the first holder how do you ensure the battery touches the holder contacts.


When a button top cell is needed, I simply use a very small magnet on my flat top cells, which turns them into "button tops".
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buckshot164
Good idea.  You can also hook a charger up the same way.  Aa long as your magnet does not ever touch the side of the battery.  Ground goes all the way to the top of the battery.  This is why many blow up.  The second type I sow I use a piece of wire between the battery terminal that will burn off if shorted.
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coyote08
buckshot164 wrote:
You don`t need protected batteries if you use a fuse link between the batteries and power source.  Look up power wall.  The holders listed first work good on button top batteries.  I using laptop batteries in the first holder how do you ensure the battery touches the holder contacts.


The protection circuit makes sure the battery doesn't go below I think 3.2V, I know it's 3. Something. You want to keep the voltage about that cut off or you can ruin the battery cell. The circuit protection also protects against pulling too many amps too I think.
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buckshot164
Your camera has the same function built into it. 
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coyote08
I always thought the batteries have the built in protection because laptop and other battery packs like drills also have the protection build into the battery pack not the device. I'd rather have the circuit protection built into the holder. I think the ones I have are 2amp protection along with the voltage protection.
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buckshot164
Those maybe different and might be part of the pack.  Your camera is different and should not drain completely.
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