10440 batteries

Hey guys, long story short I need to use 10440 AAA's for a build I'm putting together. My only problem is that these batteries are rated at like 300mAh, which sux I.M.O. Do any of you know where I can find ones with a larger capacity, and a charger that charges the batteries in a reasonable time frame, like less than six hours, and preferably one hour? Thanks for your help everyone!

600mah: 10440 3.7V 600mAh Rechargeable Battery (2-Pack) $4.41 - Free Shipping

I think I've seen 900mah too somewhere

Grix said:

600mah: 10440 3.7V 600mAh Rechargeable Battery (2-Pack) $4.41 - Free Shipping

I think I've seen 900mah too somewhere

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Ok, it might say they're 600mAh, but most of the time the resellers go by what the manufacturer puts on the label. They're probably not even close to advertised capacity.

I use them on most of my builds

1) is a sentek 16x red ran at 300 ma runs at about 205 mw

2) is a bluray phr at 150 ma runs at 145 mw

3) is my latest build a 6x at 176 ma i think it was at 207 mw

the 300 ma one lasts about 30 minutes of use max

These look like the same 10440's that DX has. Mine came from DX. Note that these are unprotected cells. Therefore, do not over-discharge them. Keep an eye on their voltage, and recharge them when they go below 3V or so. My DX charger charges my 10440's fairly quickly, seems to be less than 90 minutes always. My 10440's are used in blurays and a couple of small flashlights. In a PHR bluray set at 150mA I get more than 2 hours on-time from a set of 3.

potatorage said:

Ok, it might say they're 600mAh, but most of the time the resellers go by what the manufacturer puts on the label. They're probably not even close to advertised capacity.

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Yeah, that's exactly what I'm worried about. The 10440's I saw were advertised @ 500mAh, but people said they're actually 300mAh. I would be able to live with the 300mAh's if I had a rapid charger for them, just buy a few extra pairs.

billg519 said:

These look like the same 10440's that DX has. Mine came from DX. Note that these are unprotected cells. Therefore, do not over-discharge them. Keep an eye on their voltage, and recharge them when they go below 3V or so. My DX charger charges my 10440's fairly quickly, seems to be less than 90 minutes always. My 10440's are used in blurays and a couple of small flashlights. In a PHR bluray set at 150mA I get more than 2 hours on-time from a set of 3.

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Hmm, 90 minutes is definitely do-able for me as far as charging goes. However now you're got me worried about the cells being unprotecred. Do any reputable companies such as Duracell or Energizer make batteries like this? I'm guessing these batteries don't have the memory effect since we need to charge them before they dip below 3.0v....

mfo said:

Yeah, that's exactly what I'm worried about. The 10440's I saw were advertised @ 500mAh, but people said they're actually 300mAh. I would be able to live with the 300mAh's if I had a rapid charger for them, just buy a few extra pairs.



Hmm, 90 minutes is definitely do-able for me as far as charging goes. However now you're got me worried about the cells being unprotecred. Do any reputable companies such as Duracell or Energizer make batteries like this? I'm guessing these batteries don't have the memory effect since we need to charge them before they dip below 3.0v....

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I've never seen duracell or energizer make these at all. Lithium batteries don't have the memory effect.

potatorage said:

I've never seen duracell or energizer make these at all. Lithium batteries don't have the memory effect. You can also find protected ones, but they're less common and cost more.

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I've never seen protected 10440's

Peace,
dave

Hm maybe you're right

So if I use these batteries to power a PHR-803T blu ray diode, how will I know when to change them? What happens if they discharge below 3.0v? Damage to the batteries I imagine? The chargers will at least protect me from over charge, right?

mfo said:

So if I use these batteries to power a PHR-803T blu ray diode, how will I know when to change them? What happens if they discharge below 3.0v? Damage to the batteries I imagine? The chargers will at least protect me from over charge, right?

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If you're using the rkcstr--When the batteries drop below around 3 volts, the driver drops out of regulation and the diode dims. The batteries will be damaged if they are over discharged.

billg519 said:

These look like the same 10440's that DX has. Mine came from DX. Note that these are unprotected cells. Therefore, do not over-discharge them. Keep an eye on their voltage, and recharge them when they go below 3V or so. My DX charger charges my 10440's fairly quickly, seems to be less than 90 minutes always. My 10440's are used in blurays and a couple of small flashlights. In a PHR bluray set at 150mA I get more than 2 hours on-time from a set of 3.

Click to expand...

potatorage said:

If you're using the rkcstr--When the batteries drop below around 3 volts, the driver drops out of regulation and the diode dims. The batteries will be damaged if they are over discharged.

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So once the diode dims, recharge them, or will it already be too late for the batteries?

mfo said:

So once the diode dims, recharge them, or will it already be too late for the batteries?

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I think you still have time to recharge them.

A suggestion about the fact that these cells are unprotected.

There's not too much to do for the discharge thing, cause, at least for that what i've seen, there are no protection circuits that fit this diameter (or, at least, i have not yet seen them around).

But for the charge part, you can turn a cheap charger in a protected one, for very few money and just a bit of soldering work, so at least you don't have to worry about the "keep-an-eye-on-charging-batteries-for-avoid-a-kaboom" part , when you're charging them

If you want to do it the same way i done, just get a pair of protection circuits from old, dead protected cells, or if you don't have them around, just buy a pair of them from DX ..... there are 3 sizes, if you don't have space problems, choose the big ones, that handle more current, like this or this , if instead you have space problems inside the charger, you can choose this (that is the one that is used on AA / 14500 type, and as far as i know, is the smallest one available) ..... and a cheap charger that hold 10440 size, don't care the brand, the important is that it holds 10440 size and that is made for lithium cells ..... open the charger (open, not mangle ), glue the circuits somewhere in the way they don't touch anything (careful with insulation), and connect the long strip to the positive contact of the battery, desolder the negative wires from the negative contacts of the battery holder and solder them to the "back" contact pad on the circuit, then solder the short strip in place of the negative contact of the battery holder (also, better substitute the strips with pieces of insulated wire, ofcourse ..... for not made confusion, substitute the short strips with black wires and the long strip with red wires, so after you don't risk to exchange them)

all done ..... keep the charger for your 10440 cells only, ofcourse, don't use it for other already protected cells.

Connections as in the draws, cause my english is not so good, draws are always more clear

i wish i can avail of this battery here in the philippines its a RARE find. and our Customs is some how strict on it.

If per-say you might have over dis-charged one of these... what if any would be a way to find out. I see that when they are being charged a damaged batt. will charge in no time compared to one that is undamaged.

also after having alot of these laying around I recommend not having more than you can use or keep track of... gets to be a little like a job making sure that they are all charged.

one more thing...when you receive these from Dx charge them up first. Iskor I think thats what happend to yours and mine I now charge them first. sorry.