4-Position Advanced Quick w/Mobile Charging Technology

If you want to know how to use this device, here's the simple tips in the next 3 paragraphs, but if you want to know why I think this product is so amazing, read the whole thing: Charging: Make sure you are using a USB power source that can provide over an amp of current. If the lights are flashing as you're charging, it will still function, but charge time will take longer and the end of charge determination won't be accurate so the batteries will likely overcharge some and become degraded faster (over the course of many charges). To avoid this, use a USB power source with a better current rating (this is partially a limitation of the charger and partially a limitation of the chemistry; NiMH gives a better end of charge signal when it is charged fast enough). Other than that, charging is pretty simple and straight forward. Watch out for bad connections; if a battery light doesn't show up, try spinning it a little bit while in the charger and it will likely clean up the contact points on the connectors. Power bank mode: There is a minimum current to keep the power bank on - if you have a very low load connected, the power bank will shut off after a minute or so. There are some circuits you can put together to trick this, but just be aware that it's there. Do not use "heavy duty" batteries in this or any 4 cell power bank; they won't work right because that battery chemistry can't supply enough current. Here's, in the technical sense, why I say this is the most advanced NiMH charger+power bank in existence: They created all this functionality using only one inductor. That's why you can buy it as cheap as it is, because the circuit is pretty ingenious and it avoids expensive parts. I don't know how to explain this to non-electrical engineers but if you did "the normal thing" you would expect to see 4 or 5 inductors - one for each cell and likely one for the USB input. And an extra circuit to start it up in power bank mode that might need like a joule thief style transformer. It wouldn't be viable to sell this at a reasonable price point. Basically, instead of treating each cell independently at the circuit level, there's a bunch of solid state switching to select which cells are in series and which are bypassed, so that at any given moment it acts like "one" battery, but the internal computer can reconfigure this quickly when it wants to so that it can end charging to specific full cells or balance draw in power bank mode. This device charges each cell individually (no problem for charge / size mismatch), and assuming it's in its -dV charge termination mode (lights aren't flashing) it charges cells nearly perfectly to capacity. Likewise this is not just a "slam all the batteries in series for power bank mode" thing (well, it is, topologically, but it can also bypass individual cells under computer control so it can work as if they were all separate!) - it is fully regulated in all aspects and enforces a maximum output current just like every other good USB charger. I think it even tries to balance the draw if you have a mix of AA and AAA batteries in it but I've only tested it with 1 AAA + 3 AA scenario but it handled that well. If you made it all the way through this review, I hope you got at least a quarter of the excitement that I had when I first took one of these apart and was amazed at what I saw inside it.

very like this panasonic charger . It can act as power bank. The Mobile Charging Functions USB DC 5V output, which uses stored battery power to charge mobile phones and other devices. --> its worth it. when batteries are installed, the charger measures each cell and the corresponding light indicates the remaining charge However this US version did not come with LED light attachment. (BQ-CC87A sold in amazon Japan is include a LED light attachment ) Finally it work with ikea rechargeable batteries (which is a older generation eneloop )

Quality good, does it job well. Must have if got a stock pile of a rechargeable battery. Since it make identify bad battery easier compared to stock chargers from Sony and Energizer, also charges decently fast. Only con, micro-usb. If Panasonic released a USB-c version, I would definitely grab it ASAP

This is such an ingenious product. Charges batteries perfectly and I love how you can use it as A power bank. Will be getting a second one for mh earthquake preparedness kit soon. The only room for improvement is the super lite plastic slide cover could be a little more robust it feels Like it could snap off easily, Altho it hasn't. And I wish it had USB c but I think next generation will have it i Hope

While there are slots for AAA batteries, they are too large, and the batteries don't fit, so won't charge. If you only care about AA batteries, it works well for those.

I'm glad Panasonic make this product. I have a small cabin solar system that incorporates USB-C power ports. This unit allows me to charge batteries without having to fire up the inverter, which I'd have to do to use an AC powered battery charger.

está muy bueno, sería mejor si tuviera entrada tipo C

No mantienen la carga.

This is my second Eneloop charger, purchased to handle a new 12‑pack of AAA batteries and to finally retire my old Sanyo‑era Eneloop charger. I’m really impressed with the BQ‑CC87’s smart features and its sleek black design. It’s only slightly taller than my old two‑slot Sanyo Quick Charger. The standout feature is the three‑color LED indicator that shows remaining capacity, along with individual slot shut‑off to prevent overcharging. I picked this up for about $24 via Amazon Warehouse, and it’s easily the best charger I’ve owned. It runs cool—even with 9‑year‑old Eneloop AA batteries—and charges relatively quickly. I considered the CC17 for its lower current, but decided the CC87 was the better value since I’ll likely never come close to exhausting the 2,100‑cycle battery life. It’s faster than a slow charger, generates less heat than my Sanyo Eneloop “quick” charger, and I really appreciate that it shuts down completely instead of trickle charging. The only drawback is that the CC87 includes a USB‑A connector for the power bank feature. A USB‑C cable would have been perfect, as it would work with both my phone and laptop. I haven’t tested the power bank function yet.

Easy to use

Very easy to use, very compact and very good look as well.

Charges my AA & AAA very well. They charge completely and works for long.

First off, it's a micro usb port. Why it's not usb c is anyone's guess. It takes ~1.5h/battery to charge using a 1A 5V power adapter (not included). In 6hrs you can have all 4 batteries fully charged. Seems to be designed for mobile use rather than a "main" battery charger. Can be used as a battery bank or as a battery charger. Great in a pinch, but it's niche.