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NiMH AA rechargables, 2300mAh!!! Questions

NiMH AA rechargables, 2300mAh!!! Questions

Old 08-08-2004, 09:59 PM
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Default NiMH AA rechargables, 2300mAh!!! Questions

I went to Target and bought an 8-pack of Energizer 2300mAh AA batteries for my radio. For 20$, this is great! I hate wasting all those alkaline batteries normally and just throwing them away.

One question I need to ask is: What is a safe charging rate for these guys? The Energizer website says they base their studies on a 230mA discharge. But this doesn't give me any charging information. I've read about NiMH chargers put out by Energizer to do anywhere from 4A to 100mA. I am doing 1A right now. I'll see if they get too hot.

All the batteries are just in my radio controller and I made a custom adapter to wire my radio recharge jack to my charger.

Being that these batteries are huge (2300mAh) I would like to know if I can bump up the charge current to 1 or 1.5A. Another guy on this forum said he's done it w/ success. But my search didn't turn up any other information.

Thanks in advance!
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Old 08-08-2004, 10:08 PM
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I also use these cells for my transmitter and they work great.

I'm charging at one amp without problems and the cells are barely above room temp when they're done.

Rob
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Old 08-08-2004, 10:29 PM
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I've been charging mine at .7 amps and they get warm so I figure thats high enough. Thats when I'm not in a hurry though, if I am crunched for battery life in between races or something I do 1.5 for short periods of time. When time isn't an issue lower is probably better in the long run.
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Old 08-08-2004, 10:30 PM
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To get more voltage and capacity, I usually charge my transmitter batteries at .5 amp.
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Old 08-09-2004, 10:46 AM
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I'm charging and discharging Sanyo Twicell 2300 AA NiMh with 1,2 amps. Seems to work fine.
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Old 08-12-2004, 11:02 AM
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How are the batteries set up when you guys charge them?? Do you have them in a special jig or something?? My mom wants to get rechargeables for her camera, (NimH) and I know that my 16x7 can do them, but what is the best way. One at a time or make something where 4 are linked in a "pack" and then charge them that way??
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Old 08-12-2004, 11:13 AM
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Go to LHs or Radio hack and buy a 4-cell battery holder and then just clip your charger leads to the contacts on the battery box.

This is how I charge the GP cells in my radio.

Originally posted by corvettecrazy
How are the batteries set up when you guys charge them?? Do you have them in a special jig or something?? My mom wants to get rechargeables for her camera, (NimH) and I know that my 16x7 can do them, but what is the best way. One at a time or make something where 4 are linked in a "pack" and then charge them that way??
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Old 08-12-2004, 11:35 AM
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I have a recharge jack in my radio so I just built a plug and connected the other side to me charger.

bye
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Old 08-12-2004, 06:18 PM
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Default u guys see the 2450mah!!!

2450 mah AA some off brand though i charge them at 1 also
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Old 08-12-2004, 08:46 PM
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i set my timer on my 3pj with freshly charged 1800mah AA's and let the thing go till it dumped. When i installed recharged cells the time had gone on for about 6 or 7 hours. With that said anything with over 2000mah is going to las for ever. One should really never need to charge at the track so a safe setting would be .5 to 1amp at home every 4 or 5 race days. More often if run nitro with long mains. Just to be safe
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Old 08-13-2004, 12:03 AM
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I got 1100 mAH in my KO Presto. Fully charged, they last for more than 12 hours...
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Old 08-13-2004, 02:42 AM
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You think that NiMh AAs are something.......I got 13 lithium ion AA batteries that I'm afraid to put in my radio, they are rated at 3.6 volts!
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Old 08-18-2004, 07:09 PM
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I am bringing this tread back to prevent from making a new one.

I got some of the Energizer 2300mAh AA batteries at target also.

I am a COMPLETE noob when it comes to charging batteries so I need some help from those who are smarter than me.

battery type : NiMH
cell number: 4
battery capacity: is this per cell? so 2300??
charge current: 1 amp (since that is what some of you guys suggested)
discharge current: .3 amps?
peak adj: _ _ mV/C _ _ mV/P
cycle number: should matter if I am just charging but do you guys cycle every time they are used up?
delay time after charge : _ _ min ??
delay tme after discharge : _ _ min ??


i'm a complete newbie so any advice I would really appreciate.

if it would be easier for someone to talk over aim(or yahoo messenger) LMK and I will try to find a time that we can talk that works for you.
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Old 08-18-2004, 07:34 PM
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im not smarter but i can help you with some of your q's

battery type : NiMH

cell number: 4

battery capacity: 2300 (yup, the mah of the individual cell )

charge current: 1 amp (i charge my 2100s at 1.5 amps but 1amp is fine - the lower charge rate is safer on your AAs)

discharge current: for AAs, i usually discharge the same rate i charge so 1.5 amps for me (since i charge at 1.5)

peak adj: 3mv/cell - i use the lowest cutoff in the CDC (which is 3mv/cell in nimh mode) since it rarely false peaks on me.

cycle number: (see note)
delay time after charge : (see note)
delay tme after discharge : (see note)

note: on my transmitter, i dont cycle after every use. for maintennance (though i doubt the batteries need this), i just cycle about once a month. but i dont use the cycle mode, i manually cycle the batteries - charge at 1.5, then after about an hour, discharge at 1.5. the next day, i charge again at 1.5 and its ready for use after peaking

since youre going to be using this in a digicam, i guess you dont have to cycle them. the camera has a low batt indicator, right? you can just charge them again at that point.

hope this helps
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Old 08-18-2004, 10:42 PM
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I noticed my AA's got warm at 1A so I've been charging at 0.7A.

See ya,
Donovan
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