charge rates peak rate

[chimeraxp]

Hey quick question for ya's
i'm just going through my battery's and wanted to make a label for them .
how does one figure out the charge rate for the battery's ?
and the peak rate
I have a tower hobbies digital peak , it was with in my price range , my pa has one like it to made by another company he has never had a problem.
with no many trucks , it can get tricky to remember what has what it , I thought I would make labels for the charger it self.

 

[bull8042]

I know this is an old post, but I wanted to answer it in case someone else needs this information.
**Note: Even though I am an electrical engineer, I plagiarized much of this because I am a lazy typer.

A battery’s total rated capacity is a number that indicates how much charge energy or “capacity†the battery can store, and should always be listed on the battery’s label as “mAh†(“milli-amp hoursâ€). Capacity is also referred to as the “C†rating. Charge currents are also expressed as a function of this “C†rating. For example, a 3300mAh battery would have a “1C†charge current rate of 3300mA or 3.3 amps. This battery’s 2C rating would be (3.3 x 2) 6.6 amps, etc.

“Nâ€, “AAA,†“AA†and “A†size NiMH batteries can safely be peak charged at currents up to 1.5C (battery capacity in mAh x 1.5). High charge currents can overheat batteries and reduce service life.

Top-off Charge (NiMH batteries only): Nickel-metal hydride batteries can benefit from having a short “top-off charge†applied to the battery after peak charge has ended. This top-off charge current is typically larger than a “trickle†current and is designed to help fill the pack to maximum capacity more quickly. It’s recommended that the top-off charge current setting be no greater than 1/5th of the “pack capacity†value (mAh printed on battery pack). If the battery capacity is 3000mA, the top-off charge current should be no greater than (3000mAh / 5) 600mA.

Here are some general guidelines to get you started.

Battery Capacity__Charge Current
700 - 1400mAh__________1.5A_____
1500 - 2400mAh_________3.0A_____
2500 - 5000mAh_________5.0A_____