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The BONAI 4 Bays Battery Charger offers smart, simultaneous charging for AA and AAA Ni-MH/Ni-CD batteries with an intuitive LCD display and universal Micro USB input. Engineered with multiple safety protections and a compact design, it’s the ideal charger for busy professionals who demand efficiency and reliability.




| Package Dimensions L x W x H | 10.9 x 7.1 x 3.6 centimetres |
| Package Weight | 0.1 Kilograms |
| Product Dimensions L x W x H | 9.2 x 2.6 x 6.4 centimetres |
| Item Weight | 0.15 Pounds |
| Brand | Bonai |
| Colour | Akku Ladegerät 03 |
| Part number | BNAC17081404IT |
| Size | 4 Slot Charger |
| Warranty description | 1 year warranty |
| Guaranteed software updates until | unknown |
A**R
Value for money, works perfect
Primarily purchased this charger to recharge sets of eneloop pro batteries to use with an xbox controller, works well, the pros for me are as followsProsUSB POWERCOMPACT AND EASY TO STOREDOES BOTH AA & AAACAN CHARGE INDIVIDUAL BATTERIES, this very useful since I have 2 mice in the house that both power from a single AA battery.CONSA LITTLE SLOW AT CHARGING, not really an issue if u plan to have a spare set of batteries so you can interchange while your charging.Have already replaced all AA batteries in the house to be part of the recharging chain, plan to do exactly the same with AAA ones, of which there are several remotes around the house relying on them, so no more need of disposing of used batteries and instead can rely on a chain of recharging batteries for every device that requires them thought the entire house
B**Y
Its small but does its job.
This charger is much smaller than I expected as i didn't really check out the dimensions on the advert. To this extent it is perfect for travelling.However it's size does not affect its use. You add your batteries it determines what they are made of and charges accordingly. Each battery has its own LCD which displays battery and charge info.Its easy to use and charges. Its just what I needed.
D**S
Great Battery Recharger with Digital Display
I initially got this battery charger because we have a pair of wireless headphones in the bedroom so one of us can watch TV while the other sleeps. Well those headphones seem to suck up the batteries so fast, we were going through batteries like crazy!!! The headphones take AAA batteries but I liked that this charger also does AA as well. The batteries fit in easily and there's a nice, bright digital display to show you how much is left to go. I got a pack of Amazon Basics rechargeable AAA batteries and they work perfectly with this charger. No more changing batteries to just throw them away every week!! The only down sides is the USB cable is, to me, a bit short. I couldn't plug it in to a USB charger and set it in a table while it charged. It had to sit on the floor. And, maybe it's just me, but it seems that it took a long time to charge. But I'm probably being impatient. Overall, a great little battery recharger. (Use rechargeable batteries only!!)
M**S
Runs from USB output, so no chance of Overcharge.
A brilliant piece of kit that operates from USB power supplies and can charge AA/AAA Batteries without frying them; the USB supplies I use are all regulated to 5 volts, so no chance of overcharge as can happen with many chargers.Could work from a power supply pack, but I would recommend that a power pack should be rated at around 25000mAh otherwise the pack would run out of power before fully depleted AA batteries were fully charged.Can be used with a computer/Laptop USB output, particularly more modern machines.
M**.
Works well at low price.
Nice little charger that works well and at less than £10 is good value. Useful that it will charge 1,2,3 or 4 batteries rather than pairs.
W**R
The charger seems to get awfully warm. Why?!
We're no strangers to smart chargers, we currently use a couple of nitecore intellichargers, but these are pretty much in constant use with lithium batteries.So the decision to get this was based on the need to recharge standard rechargeable AA/AAA (Amazon brand, actually) after our old energiser charger decided it had reached the end of it's life.We aren't convinced this works as well as the listing states. Our main concern is the fact that the charger itself gets very, very warm. A read back through other reviewers remarks would indicate that this seems "normal". However, heat is energy transfer, and as you're supposedly depositing electrical energy into the batteries, any transfer of energy into heat should theoretically be within the batteries, not the charger itself! I'm not pretending to be an expert on electronics here, but if the charger itself is getting hot I wouldn't have thought it's working too efficiently (it's hard to ascertain if the batteries are slightly warm because of the charger being very warm). Our last AA/AAA charger didn't get warm and our nitecore intellichargers don't get warm so what's going on here then?!The USB cable is pretty short. How much do these things cost to manufacture? It always irks me when a manufacturer, who produces something with convenience in mind (such as ease of use for travel), cannot provide something as simple as a decent length of cable. If a longer USB cable in some way affects the performance of this charger, I would again question the quality of this charger. I'm only guessing that's the reason for the short cable. This thing needs a longer USB cable to make the actual convenience work!Once the batteries are charged, we've noticed (using our smart USB charger) that the chargers power input seems less of a trickle charge and more of a zigzag power demand. Hmmmm!It's pretty damned slow to charge compared to our previous Energizer wall charger.The display is handy enough.Overall, this charges the batteries okay, but we just aren't convinced this has the IQ of a good quality smart charger.
Q**D
Saved approx 25 batteries from the bin
I already had a fast charger, but it seemed to be saying more and more of my rechargeable batteries were bad, and because that charger charges 2 batteries at once, it would kick them out 2 at a time. This charger charges batteries individually, and so assesses them one at a time. Yes I have still had to throw away 7 bad batteries, but the rest have charged OK.Only time will tell when it comes to seeing how well they have charged, but at the moment it's looking good. The charger is very lightwight, and you will need to have a USB power supply to plug it in to. The package includes the charger and a short USB cable. The only issue I have with this charger is that the LCD display is quite hard to read at times. Apart from that, it charges fine and quite quickly too.
P**.
Battery charger
Use this to recharge many of my rechargeable batteries. It still works as is convenient to use. The quality seems adequate and although It takes a while to charge, you would expect this
Trustpilot
2 weeks ago
2 weeks ago