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Old 12-26-2009, 10:08 AM   #1
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Default NimH chargin question?

How fast and how often can I charge a 4200mah, 6 cell, nimh battery?
Can I take it off the track and immediately charge it at a quick charge?
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Old 12-26-2009, 10:13 AM   #2
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it has to cool down,charge it at 5-6 amps no more than 3-4 times a day
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Old 12-26-2009, 07:32 PM   #3
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http://intellect-battery.com/06-rc-b...g/06-index.htm
http://www.promatchracing.com/techsupport.php
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Old 12-26-2009, 07:35 PM   #4
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There is no generic answer.

Ask the manufacturer or determine it by experimenting.
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Old 12-26-2009, 10:31 PM   #5
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You charge at 5A & max 6A for punch.. It takes usually 50 mins to my experience. For max energy storage you need to have a fan blowing the battery all while they charge. Heat is battery greatest enemy.
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Old 12-27-2009, 12:17 AM   #6
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How fast and how often can I charge a 4200mah, 6 cell, nimh battery? Depends on charger, charge current and cut back voltage.
Can I take it off the track and immediately charge it at a quick charge? NO!!! Do not cool in any way to speed cooling. Think of it as the chemicals need to settle a bit.

2 Simple things to remember on nicd and nimh.

1. never charge a hot or warm battery
2. these 2 are not fully charged until warm (when charging at 4 amps or higher)
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Old 12-27-2009, 01:56 AM   #7
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Use this to keep your battery cool...

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Old 12-27-2009, 07:54 AM   #8
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Quote:
Originally Posted by Toh WL View Post
Use this to keep your battery cool...

Isn't it too heavy to fit into a model?
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Old 12-27-2009, 08:01 AM   #9
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i love lipo.

8amp charge, race it, 8amp charge, race it.... all nite long

There are 10 different answers or more to this question. depends who u ask.

Ideally you will equalize(each cell) discharge before every charge. otherwise poof go the cells....

Back when i used to babysite nihms i would run 2 packs. alternate them during a race nite. giving a bit of cool down time
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Old 12-27-2009, 08:02 AM   #10
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Quote:
Originally Posted by Toh WL View Post
You charge at 5A & max 6A for punch.
Is this advice for all 4200 NiMH on the market, regardless of a condition, construction, age, status of individual cells, etc including those being discussed?


Quote:
Originally Posted by Toh WL View Post
For max energy storage you need to have a fan blowing the battery all while they charge.
Is this what a local dude does or it is actually recommend by one of the reputable manufacturer? Can you send us a link?
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Old 12-27-2009, 08:08 AM   #11
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Under SMC Advice i would do the following:

-Tray pack to .9v per cell
-6amp charge
-run car
-discharge @ 20-30 amps
-let cool and recharge @6amps
-end of the day store with 50-80% charge


Key is to tray to .9v per cell on the day of use. self discharge levels of all cells is different, this ensures they all start there charge at the same level.
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Old 12-27-2009, 07:36 PM   #12
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Quote:
Originally Posted by ozvena View Post
Isn't it too heavy to fit into a model?
You are to remove the batt from the car & fit it in from either left right side.
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Old 12-27-2009, 07:40 PM   #13
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Quote:
Originally Posted by ozvena View Post
Is this advice for all 4200 NiMH on the market, regardless of a condition, construction, age, status of individual cells, etc including those being discussed?
This is case to case basis. You can have batteries which false peaks or dead cells & also some cells which are short life.

In order to prolong usage, it's advicable to discharge each every cells to 0.9V after races prior charging.
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Old 12-27-2009, 08:08 PM   #14
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In event you want best performance for individual cell. You may look at Spintec Individual Cell Charger.

http://www.spintec.nl/ICC.shtml

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Old 12-27-2009, 08:19 PM   #15
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Quote:
Originally Posted by Toh WL View Post
In event you want best performance for individual cell. You may look at Spintec Individual Cell Charger.

http://www.spintec.nl/ICC.shtml



Then again if he has the coin to dump on that... Why not just get a lipo charger and a single good quality lipo and be done with all the guess work???
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