Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: 7.2v to 6.0v  (Read 2449 times)

MichaelK

  • Guest
7.2v to 6.0v
« on: August 25, 2010, 10:46:31 am »

Hi
 I have a 7.2v 5000mAh pack that has a Dickky cell, so that it only sits at 6.?v  >>:-(
 (I replaced it with another identical pack from HK for 1/2 the price I paid originally) :-)
My intention is to pull it apart, find, and get rid of  the Dickky cell, and re-build it into a 6.0v pack.
The battery charger that I use is a "ANSMAN acs 67p" (delta charge) (whatever that is!)
My Questions are:
 Will my charger blow the battery pack apart?
 Will my charger blow itself up, and burn down the house?
I need another pack to power a water pump to cool the motors.
Thank you
Mick
Logged

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,423
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: 7.2v to 6.0v
« Reply #1 on: August 25, 2010, 10:54:38 am »

Your Ansmann ACS 67P Quick Charger is only for NiCd/NiMH RC battery packs with 6-7 cells (7.2-8.4V) not 6.0v.
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

MichaelK

  • Guest
Re: 7.2v to 6.0v
« Reply #2 on: August 25, 2010, 11:47:44 am »

Thank you,
any suggestins?
Mick
Logged

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,423
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: 7.2v to 6.0v
« Reply #3 on: August 25, 2010, 12:30:34 pm »

One of these ?

http://www.component-shop.co.uk/html/body_radio_control1.html

Click on picture of charger for details of it.
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

john s 2

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,172
  • Location: Southend on Sea Essex
Re: 7.2v to 6.0v
« Reply #4 on: September 09, 2010, 07:33:02 pm »

If youre taking the pack apart.Why not replace duff cell with simelar one.Then you can charge as before.
Logged

MichaelK

  • Guest
Re: 7.2v to 6.0v
« Reply #5 on: September 10, 2010, 12:12:41 am »

I hav'nt been able to find single cells the same. :((
I bought a new pack from Hong Kong, but they don't do single cells
Mick
Logged

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,027
  • Location: Blackpool, Lancs, UK
Re: 7.2v to 6.0v
« Reply #6 on: September 10, 2010, 12:19:44 am »

If youre taking the pack apart.Why not replace duff cell with simelar one.Then you can charge as before.
Similar isn't good enough, it needs to be identical, or else it will either hog the charge and overcharge or under charge and over-discharge, resulting in early failure of itself or its new mates.  I've had acceptable results using reduced packs for lesser jobs, and rebuilding the remains of two dud packs into one fairly good one, but I wouldn't buy a new cell to fit into an existing pack.  Apart from anything else, the manufacturers keep "improving" things, so a close enough match becomes a problem when buying off the shelf.
Reply just bounced it while I was pecking at the box, illustrating the problem.
Logged
"With the right tool, you can break anything" - Garfield

Rex Hunt

  • Guest
Re: 7.2v to 6.0v
« Reply #7 on: September 10, 2010, 08:38:49 am »

Surely if theV  and mAH matches there should be compatability?

Rex
Logged

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,027
  • Location: Blackpool, Lancs, UK
Re: 7.2v to 6.0v
« Reply #8 on: September 10, 2010, 11:48:19 am »

Surely if theV  and mAH matches there should be compatability?

Rex
Should is the operative word.  Actually finding one of the same capacity and charging/discharging characteristics to get optimum performance is not easy, so, like I said, it is not going to be reasonable to expect the remade pack to have the full performance of the new one.  Depending on the intended use, this might not matter.
Logged
"With the right tool, you can break anything" - Garfield
Pages: [1]   Go Up
 

Page created in 0.162 seconds with 23 queries.