Even cheaper than last time. Many in the range are discounted. The 8 pack and charger is even better value per cell. I'm getting some for my power hungry Aqara Doorlock.
CamelCamelCamel.
Perfect use case. As they advertise.
I’m using these with my Aqara G4 Doorbell and they work great.
I thought Lithium native Voltage is 3.7v. There must be a switch voltage converter built in.
That is correct.
Yes there is one usually stuffed into the top.
Because of this, they usually aren't advisable for sensitive electronics as the power coming out can be a bit noisy.
Anything else is fine.
Can these charge other brand 1.5v AA li-ion battery? Like from EBL etc? Or they only work for Xtar?
They work only for Li-ion batteries that charge at 5V. So far the ones I have tested are Xtar's own battery and the Jugee brand.
Thanks for the reply. I would have thought the all AA 1.5V lithium would work the same way & charges the same way no matter the brand?
LIke NI-mh would.
I looked into whether these would be useful in replacing eneloop/ikealoops. The actual mAh capacity of these lithium AA is 2500mAh (note how they use mwh - sneaky!). Might be useful for devices needing high discharge but capacity wise, it's similar.
Eneloop is 1.2v, not sure it will make any difference.
Watt hours is actually a better measure of capacity, but even though the mAh of these doesn't seem great, you do have to remember that it's at 1.5V rather than 1.2V, approx 20% more.
Ah yes these do store more energy. Would be useful in certain cases
Max discharge is a claimed 2ah after that it says it cuts off. In comparison primary lithiums can be up to 10ah.
No they are not. Energizer Ultimate Lithium AA primary batteries claim 3500mAh capacity at 200mA to 1000mA discharge rates.
I misspelled ‘rechargeable’ oops
How does this fair vs say the xtar vc4sl or even the X4? Or are there more preferred brands by this knowledgeable community?
The Xtar LC4 charger only does 1.5V lithium AA/AAAs.
Alternatively, the L4 does the 1.5V lithium AA/AAAs and also the typical 1.2V Eneloop/Ikea.
VC4SL is a bit more of an enthusiast charger and has other functionality to check cell health, control charging etc.
X4 seem like a dumb multi-chemistry charger that can take both AC and USB-C
Ah ok thanks for pointing that out to me. Would you have some to recommend as you seem to know what youre talking about? The X4 can connect as a usb power supply which caught my eye, or is that more of a useless gimmick you reckon?
It depends what you intend to charge or do with it.
AA/AAAs it should be ok.
But if you intend to charge large lithium cells, it'll be too slow if using USB-C input.
Also the USB output is a bit of a gimmick at 5V 1A output.
Yeah i do have larger lithium cells that i intend to charge eventually. Always thought usbc can draw more than a micro usb, clearly a flawed point i have. Am i worth taking a look at other brands mate? Or stick to this one?
Haven't looked at brands (or chargers in general) in a while, but XTAR should still be a decent brand.
There's cheaper brands that sometimes come up on OzBargain such as Liitokala.
Just make sure you check the specs of the charger you're interested in and also reviews if available.
The X4 has DC input of 5V 2.1A (~10W) which is a bit of a red flag if you intend to charge a few large lithium cells at a time, in a timely manner.
If you don't mind waiting a few hours then it should be fine.
Their new VX4 multi charger can charge both these new 1.5V lithium AA/AAA's as well as the typical 1.2V NiMH's and the usual array of 3.7V Lion and Lifepo4 cells - also has a 20W USB-C PD input (and can do 1x3A, 2x2A or 4x1A charging - NB it's limited to 4x0.5A for the AA/AAA cells)
Micro USB can supply 18W. With 4 batteries charging at 5V 500mA, that is only 10W. With larger batteries charging at 2A, the X4 will only charge 2 at a time. So that is 4.2V x 2A x 2cells = 16.8W
Would these be suitable for the following door lock? Been keen for a while to find some rechargeable batteries to work in it. Managed to get Ikea Ladda 1.2V 2450mAh working in it once, but then when I recharged them and tried again couldn't get them working. Always came up saying battery low.
Yes they'll probably be better then the ikea laddas as these give out a constant 1.5v until they're flat. Ikea (and other rechargeable NiMH) tend to run at lower voltages and may trigger low voltage alerts early.
The compromise is these need special chargers and I'm not sure how they run on constant low drain applications like yours.
I bought this just for curiosity sake.
Its a tough ask.
$8 per cell against Ikea Ladda $2.5 to $3 per cell.
This would be an option only if your device doesnt work properly on 1.2V Ni-Mh.
Just an update.
Batteries and charger work fine in this combo as the batteries have an inbuilt led and it blinks while being charged and goes solid after its fully charged.
But I bought an older XTAR 3300mWh/2000mAh version AA battery which does not have a led indicator built in and found that there is no way to tell if the LC4 charger is charging or not and whether the batteries are full charged………..Because the single indicator light on LC4 is always solid green.
Anyway better to buy Xtar MX4 or VX4 i think.
Oh well its a hobby anyway.
I never saved any money on rechargeable batteries because I bought too many chargers and some of them are/were fancy ones.
I managed to charge the older cells also in the LC4 after plugging in a usb power meter.
The amps consumed start decreasing as the cell becomes full until its less than 0.1A for 4 batteries.
That should mean its fully charged more or less.
Are these ones also good for battery doorbells? Anyone had experience?