MP7 battery question

^Hyperion^ · July 2nd, 2006, 13:35

I just wanna know if we could use other 7.2v batteries but with higher mAh ?

Like these : http://www.megabatteries.com/items.asp?cat_id=56

1700 mAh , 2100 mAh etc.

or if you want to use a 8.4v in a fake Laser unit , do we only need a
mini to large plug ?

thanks in advance !

Mr Jon · July 2nd, 2006, 13:39

Actually you'll need to pick up an external battery adaptor such as this in order to use larger batteries.

8.4V Mini Type or 7.2V Large Type Battery is recommended, using 8.4V or higher Large Type Battery may cause damage to internal parts

http://www.wgcshop.com/pcart/shopper...P7EBA_srch_MP7

^Hyperion^ · July 2nd, 2006, 14:43

ok , that's really interesting. My question now : Is it really worth it or buying an extra battery would do the job ?

Gryphon · July 3rd, 2006, 00:22

I think tearing the pack apart and having a shop build you a NiMH pack out of the same size of cell would be a better option. TM is foolish to still be using NiCds. I mean, the G18 battery is only 200 mAh for crying out loud.

dlp · July 3rd, 2006, 02:55

Quote:

Originally Posted by ^Hyperion^

ok , that's really interesting. My question now : Is it really worth it or buying an extra battery would do the job ?

Personally, I would just go for a second battery. Using the MP7 as a side arm, a second battery is hardly necessary anyways.

MadMax · July 3rd, 2006, 03:06

Quote:

Originally Posted by Gryphon

I think tearing the pack apart and having a shop build you a NiMH pack out of the same size of cell would be a better option. TM is foolish to still be using NiCds. I mean, the G18 battery is only 200 mAh for crying out loud.

I suspect that NiMH cells of such small capacity may have an internal resistance that is too high to run an AEP.

If IR is too high, the voltage drop over the battery's resistance will reduce the voltage supplied to the motor and you get pretty crummy performance.

Gryphon · July 3rd, 2006, 11:43

Hmm, good point. Anyone know what size cells are in these packs? I'm thinking this is the perfect application for a LiPo. The challenge would be fitting the connector and shaping the pack to the gun. Flexible physical designs are a LiPo strength though I wonder what it would cost to custom manufacture one like that. I doubt it will be long before someone starts offering aftermarket LiPo packs for AEPs.

Ghost Snake · July 3rd, 2006, 11:52

Quote:

Originally Posted by MadMax

Quote:

Originally Posted by Gryphon

I think tearing the pack apart and having a shop build you a NiMH pack out of the same size of cell would be a better option. TM is foolish to still be using NiCds. I mean, the G18 battery is only 200 mAh for crying out loud.

I suspect that NiMH cells of such small capacity may have an internal resistance that is too high to run an AEP.

If IR is too high, the voltage drop over the battery's resistance will reduce the voltage supplied to the motor and you get pretty crummy performance.

If the voltage drop is too big, couldnt you just use a higher voltage battery then? If you used an 8.4 or 9.6 or something, would that not compensate for the voltage drop?

Mantelope · July 3rd, 2006, 12:17

Somewhat, but you wouldn't be able to fit it in the gun. Higher voltage means more cells.

^Hyperion^ · July 3rd, 2006, 17:42

man , I barely can understand what you guys are saying but whatever. If I use the MP7 , it will be as a CQB primary. Do you think I should buy tha package + another battery + 10 STAR mags ?

what d'you guys think ?

Gryphon · July 3rd, 2006, 20:14

That sounds like a pretty good package to me.

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July 2nd, 2006, 13:35	#1
^Hyperion^ Trader rating Join Date: Jan 2006 Location: Montreal , Quebec	MP7 battery question I just wanna know if we could use other 7.2v batteries but with higher mAh ? Like these : http://www.megabatteries.com/items.asp?cat_id=56 1700 mAh , 2100 mAh etc. or if you want to use a 8.4v in a fake Laser unit , do we only need a mini to large plug ? thanks in advance ! __________________

July 2nd, 2006, 13:39	#2
Mr Jon Trailer Park Supervisor Trader rating Join Date: Jul 2003 Location: Winnipeg MB	Actually you'll need to pick up an external battery adaptor such as this in order to use larger batteries. 8.4V Mini Type or 7.2V Large Type Battery is recommended, using 8.4V or higher Large Type Battery may cause damage to internal parts http://www.wgcshop.com/pcart/shopper...P7EBA_srch_MP7 __________________

July 2nd, 2006, 14:43	#3
^Hyperion^ Trader rating Join Date: Jan 2006 Location: Montreal , Quebec	ok , that's really interesting. My question now : Is it really worth it or buying an extra battery would do the job ? __________________

July 3rd, 2006, 00:22	#4
Gryphon Trader rating Join Date: Mar 2005 Location: MB	I think tearing the pack apart and having a shop build you a NiMH pack out of the same size of cell would be a better option. TM is foolish to still be using NiCds. I mean, the G18 battery is only 200 mAh for crying out loud.

July 3rd, 2006, 11:43	#7
Gryphon Trader rating Join Date: Mar 2005 Location: MB	Hmm, good point. Anyone know what size cells are in these packs? I'm thinking this is the perfect application for a LiPo. The challenge would be fitting the connector and shaping the pack to the gun. Flexible physical designs are a LiPo strength though I wonder what it would cost to custom manufacture one like that. I doubt it will be long before someone starts offering aftermarket LiPo packs for AEPs.

July 3rd, 2006, 12:17	#9
Mantelope Scotty aka harleyb Trader rating Join Date: Mar 2004 Location: Toronto, Ontario	Somewhat, but you wouldn't be able to fit it in the gun. Higher voltage means more cells.

July 3rd, 2006, 17:42	#10
^Hyperion^ Trader rating Join Date: Jan 2006 Location: Montreal , Quebec	man , I barely can understand what you guys are saying but whatever. If I use the MP7 , it will be as a CQB primary. Do you think I should buy tha package + another battery + 10 STAR mags ? what d'you guys think ? __________________

July 3rd, 2006, 20:14	#11
Gryphon Trader rating Join Date: Mar 2005 Location: MB	That sounds like a pretty good package to me.

MP7 battery question

Airsoft Guns Discussion