Add Any 2 items from the promotion Link to your cart to get the offer.
USB Output function
Open-circuit voltage of USB output : 4.9-5.3V; and the 4th slot is fixed for the USB discharge power source
Output current: 1000mAh
Open circuit current: <1mAh
The corresponding voltage is 4.75-5.25V under 1000mAh current
Cut-off voltage for discharge protection: 3.0±0.1V
What is the delivery?
$6.95 to cities anyway… Doesn't seem too bad tbh.?
I'm getting $10.43 for two Lii-402 to Sydney metro
+1 just for having the link sorted by highest price first
Thanks! Needed a charger for new eneloops and this seems like a good price for local stock, even with shipping.
I did a fair whack of research and went with the nitecore d4. Far dearer but will treat your batteries perfectly
Link?
Charges a lot slower however
Yes, that's the point. A much quicker charge necessarily implies much faster degradation of cells. That's been my experience anyway and I'm happy to have an actual engineer or scientist correct me in a reply
happy to have an actual engineer or scientist correct me in a reply
Actual engineer here, and I've designed many charging circuits.
For NiMh batteries, there is a "sweet spot" for the charging time. Too fast (1 hour or less) and the batteries will guaranteed get hot while charging them, and getting too hot permanently damages NiMh batteries. Even 2 hours is pushing it for many batteries and chargers. If you take a battery off the charger just after it reaches full charge, and can't hold it in your fist (fingers wrapped around the battery) without wanting to drop it, it's too hot, and most likely permanently damaged. A tiny pressure seal, usually beside the positive pip and usually hidden under the cardboard disk, will pop. Once that pops, the electrolyte inside the battery will slowly dry out, with battery capacity reducing as it does. This is easily seen if you have damaged eneloop batteries, it looks like there's a water stain around the positive end of the battery.
If you charge too slowly, the -dV/dT effect becomes very small, and difficult for the charger to detect. So it may not be detected, resulting in overcharge, which also damages the batteries. More than three hours is getting into the "difficult to detect" range. However, some chargers (the Nitecore D4 and perhaps others) "time-share" the charging circuit between two battery slots - so although it may take six hours to charge four AA batteries, each battery was only charging for three hours.
In between these "too fast" and "too slow" limits, you are correct, slower is better.
I wouldn't use the charger in this deal, the Lii-402, for charging AA NiMh batteries. It's limited to 500mA charging current when charging four AA batteries, so 1900mAh or 2450mAh batteries will take 4-5 hours to charge, in the "too slow" basket. And for AAA batteries, it's <2 hours, so getting towards the "too fast" basket.
My rule of thumb: 750mA-1000mA for charging AA batteries, and 300mA-400mA for charging AAA batteries (except for the Nitecore D4). This will give a 2-3 hour charge time, the -dV/dT effect will be easy to detect, and your batteries will get warm but not hot.
@Russ: Thank you very much. When I finish my EE degree I hope to be able to provide such apt explanations as this
When I finish my EE degree
Welcome to a career of continuous learning! The fields of electronics and electrical engineering are soooo broad, and technology is always changing, so there's always new stuff to learn.
I've picked up most of my knowledge about batteries and charging over many years. I recently found this website covers pretty much everything I know, although there is quite a bit of duplication in their articles:
https://batteryuniversity.com/
I got a Nitecore D4 and this Liitokala. Nitecore D4 charge slower than Liitokala, but it's really doesn't matter for me as i have many fully charged rechargable battery. I gave Liitokala to my parents (i don't need 2 chargers) as they have less rechargable battery.
They both do the jobs for me but Liitokala wins as Nitecore D4 is more expensive. Both batteries is hot during charging, didn't really compare which one is hotter.
This is already quite slow right?
500mA*4
Ikeas will take 4hr to charge.
Only good thing is already out of stock :(
Yeah agreed :(
As usual, delivery kills the deal…