A.T. -> RE: Charging New NiMh 2000 Mah (11/9/2012 6:15 PM)
ORIGINAL: BillinIndiana I have the Tx battery charger that has the pigtail for receiver packs.. My question is how do I know when the charge is complete? It's just a basic wall charger that has a red light that lights up when the receiver is plugged into it. I'm trying to charge a new Hydrimax 2000 mah receiver pack. Also, Is there a way to test the charge on a battery before charging it ?
Basic wall chargers do not stop charging, simply slow down as resistance builds up.
Time depends upon the rating of your charger, which to charge that battery correctly,
the Rx charge output should be rated at not less than 200mAh.
Rx charge ouput rated below 100 mAh will take 24+ hours and may not peak a 2000 mAh battery.
Much more information available under sub section
"Battery Care, Performance & DIY Battery Packs."
"Radio Systems, Accessories, Alterations and FAQ" at
Alan's Hobby, Model & RC FAQ Web Links
extract from a recent post on NiMH batteries
"1. As supplied, the battery has a "chemical" charge only.
If the battery were to be charged before despatch ex factory, it would be flat before it hit the retailer's shelf.
2. NiMH do not reach full capacity until after at least the third use (charge).
3. NiCD were reasonably forgiving in the event of overcharge / overdischarge / hard knocks but NiMH are not.
Majority of NiMH cells have a shorter life span than we used to expect of NiCads, best never to exceed 1c or one hour charge rate.
4. Black wire corrosion is just as much if not more evident in NiMH than was experienced with NiCad.
When Nickel-Metal Hydride (NiMH) was introduced in the early 1990s, much was made of its memory-free status.
NiMH do suffer from crystal build up also known as "memory" but to a lesser extent than NiCd.
No proven research is known that specifies best maintenance except all concur that repeated cycling of NiMH
is not recommended because of the shorter service life.
NiMH were introduced solely to satisfy the EU "Greenies" as under the changed CE regulations, it was to become to
expensive to continue with the supply and then subsequent return to and disposal by the supplier of the poisonous
NiCD cells. NiCad are still allowed for use by emergency & medical services in lieu of NiMH.
101 re Charging RC Batteries - Titan Energy
Battery Comparison of Applications
R/C Battery Clinic - Archived Articles Listing."