Go Back  R/C Tech Forums > General Forums > Electric On-Road
recommendations for 7.2V battery monitor? >

recommendations for 7.2V battery monitor?

recommendations for 7.2V battery monitor?

Old 10-20-2004, 03:35 PM
  #1  
Tech Apprentice
Thread Starter
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default recommendations for 7.2V battery monitor?

Venom's only handles up to 6V:

http://www.venom-racing.com/product/batmon/index.htm

Are there options in a similar gizmo that can monitor the status of 7.2V-9.6V stick packs? Please send links.

Thanks,

Bill
[email protected]
billwilner is offline  
Old 10-20-2004, 03:46 PM
  #2  
Tech Elite
 
Cole Trickle's Avatar
 
Join Date: Sep 2001
Location: Denmark / Europe
Posts: 2,571
Default

Hmmm. I cant see the point with this product.

1) It's in the car, so you cant read it while driving anyway.
2) Even a completely empty 6 cell NiMh and NiCd battery will maintain a voltage around 7,2 volt, when unloaded. So stopping the car to do the read wont work....
3) The car will drive slower, when the pack is close to empty, and that can be notised from the driver stand...

If you have to check how much capasity there's left after a race, you need to discharge the pack with a discharger, which can measure capasity, usually in mAh.

I would definately spend the money elsewhere.
Cole Trickle is offline  
Old 10-20-2004, 03:54 PM
  #3  
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

Good points, Cole Trickle. I think the main reason it only handles 6v is because it's intended for nitro receiver packs. Nitro receiver packs are not as easy to tell when they start losing performce via servo speeds.
j240z is offline  
Old 10-20-2004, 03:56 PM
  #4  
Tech Apprentice
Thread Starter
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default Dischargers?

OK, that all makes sense. What type or model discharger do you recommend?

Thanks,

Bill
billwilner is offline  
Old 10-20-2004, 04:07 PM
  #5  
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

It will depend a bit on what type of motors you will use/race. 20a is generally used for stock motors and 30a for mods. I use Integy's 16x5 and 16x5v6 chargers which have a 20a discharge feature as well. I would recommend them as they perform great!

If you're on a budget you can build a bulb discharger to suit your amp needs.
Also, if you're serious about battery maintenance you can use an equalizer tray such as Novak's Smart Tray to discharge each individual cell to equal voltage.

I would recommend a high end charger with a built in discharger because it means less stuff to carry around.

Here's the charger I use:http://integy.automated-shops.com/cgi-bin/webc.cgi/st_prod.html?p_prodid=1682&p_catid=23&sid=4wSJJh10 60P1Bec-47104011930.a2

Or you can use a bulb discharger similar to this:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX50&P=7


And here's the Smart Tray: http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGGJ0&P=ML
j240z is offline  
Old 10-20-2004, 04:13 PM
  #6  
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

oops. messed up on the links. They should work if you cut and paste....Sorry....
j240z is offline  
Old 10-20-2004, 04:48 PM
  #7  
Tech Apprentice
Thread Starter
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default Chargers

Well, I'm new to all this and I'm learning as fast as I can!

I got a used FT TC3 on eBay that came with a bunch of extra stuff including a Dynamite Prophet Plus charger:

http://www.dynamiterc.com/Products/D...ductID=DYN4036

I got a couple of 7.2V NiMH 3000 "Rocket" sticks at Ultimate Hobbies (near me). Also got a HiTec MG625 servo on their recommendation.

Yesterday, I won a Novak SS5800 brushless motor/ESC set on eBay.

Now I'm shopping for either an M8 w/backlight or PK3 and a Novak Xxtra receiver.

And I'm working on a Yokomo RX-7 FC3S 190mm body.

So do I need a discharger too?

This is turning out to be a pretty expensive hobby, but not as much as my real car!

Thanks,

Bill
billwilner is offline  
Old 10-20-2004, 07:25 PM
  #8  
Tech Adept
 
Join Date: Sep 2003
Location: Wisconsin
Posts: 140
Default

No a discharger is not a must have item. Especially since you are running stick packs and wont be able to equalize after discharge anyway.

Just run the packs until the car slows noticeably and then let them rest for at least a few hours before recharging.
Lano is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.