Posts Tagged ‘Panasonic

The Folomov A1 is a compact and convenient USB charger for various single cell Li-ion batteries such as: 26650, 21700,20700,25500, 22650, 18700, 18650, 18500, 18490, 18350, 17670, 17500, 17335, 16340, 14650, 14500, 10350 and 10340. The device uses standard USB port from a computer or a USB charging adapter to charge Li-Ion batteries with 1A max charging current. The positive and negative charging terminals of the device have magnets, so they are very easy to clip on the battery sides and charge the battery. The device can automatically activate 0V battery, comes with over current charging and discharging protection, constant current and stable voltage charging mode and reverse polarity protection. What is most interesting and the reason we are testing this device is that it can also double as a power bank, using a Li-Ion battery as a source of power to charge your USB devices and not only charge batteries. Let us see how well does the Folomov A1 Magnetic Charger work as a power bank with 5V/1A output used together with a 2900 mAh Panasonic NCR18650PF Li-ion battery that we have previously charged with the A1 as well…

The Folomov A1 Magnetic Charger does work pretty well in terms of delivering a little over 1600 mAh capacity from the 2900 mAh Li-ion battery used, however we are not very satisfied with the voltage curve we are seeing. Keeping 4.8V-4.9V output voltage for about the first 1 Amp and then gradually starting to drop after that, resulting in lower Wh output, making the result not so satisfying. Still the Folomov A1 does work quite well both ways for charging Li-ion batteries as well as functioning as a power bank getting powered form a Li-ion battery. If it handled the discharge with a bit more stable voltage output it would’ve been even better, and if the positive and negative clips of the charger were with a bit stronger magnets and flatter surface for better contact it could’ve been even better. Still decent results and performance for this compact and cheap multi functional deice that can be quite handy to have in your bag if you are dealing with Li-ion battery cells often.

The performance of the 2900 mAh Folomov A1 Magnetic Charger and Power Bank in our tests:

– 1614 mAh at 1.0A load

– 7.703 Wh at 1.0A load

The 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries are one of the best rechargeable AA size batteries out there for more serious tasks including higher current loads and use in low temperatures. Normally in our tests of AA size NiMH batteries we test up to 2.0A discharge and that is already considered pretty high current load, but this time we are going higher for the Panasonic Eneloop Pro to see what you can get out of them at 1.0A, 2.0A, 3.0A, 4.0A and even 5.0A… and this is form a single battery, not from a pack of 4 for example. You can check our initial test of the 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries where we tested at 0.2A, 0.5A, 1.0A and 2.0A – our usual settings. The graph below is for the higher discharge currents we tested at and you can also see the results in mAh and Wh after that…

It seems that 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries manage to handle really well up to 4.0A constant current discharge, managing to provide a little over 1500 mAh capacity. Going for 5.0A however significantly reduces the usable capacity in a constant current discharge situation at ust a little over 112 mAh before reaching the 1V output voltage from the battery. Do note however that in a variable discharge load with peaks to 5.0A for example the situation should be much different, for example using these batteries in a flash for a digital camera. So if you need AA size rechargeable batteries that can really handle high discharge current loads, not only peaks, but constant ones, then you should definitely look for the

High Current Load of 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries:

– 2388 mAh at 1.0A load
– 2322 mAh at 2.0A load
– 2064 mAh at 3.0A load
– 1527 mAh at 4.0A load
– 112 mAh at 5.0A load

– 2.870 Wh at 1.0A load
– 2.601 Wh at 2.0A load
– 2.224 Wh at 3.0A load
– 1.591 Wh at 4.0A load
– 0.116 Wh at 5.0A load

We got a pack of the latest generation Panasonic Eneloop Pro AA NiMH batteries with 2500 mAh capacity to check out and see what you can expect from what are considered as one of the best rechargeable NiMH batteries out there. These batteries come pre-charged with solar energy and are low self discharge, meaning that they are capable of retaining up to 85% of their capacity in a year. The Eneloop Pro are great choice for use with devices that require higher current and are also suitable for use in low temperature conditions of up to -20 degrees Celsius with good performance. According to the specifications they should be good for 500 recharge cycles. Looking back a couple of years back when we have tested an earlier generation Sanyo Eneloop XX AA NiMH batteries it seems that things have not changed that much in terms of rated capacity or battery specifications.

The 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries are rated at minimum 2500 mAh capacity and our discharge tests have shown really good results with very close to that capacity usable at constant current loads of 0.2A and even 0.5A. Going for a higher discharge load of 1.0A and even 2.0A and the batteries still manage to perform surprisingly well at over 2300 mAh usable capacity in both cases. We remind you that these batteries are intended to be used for high drain devices, so we expected to see good performance with higher current loads, but we are also going to be testing them at even higher loads in a separate test to see where is the limit. So it seems that not only the specifications, but also the usable capacity of the newer Panasonic Eneloop Pro is very similar to that of the older generation Sanyo Eneloop XX that we have tested a couple of years ago. The good news is that there is no drop in quality and the new Eneloop Pro rechargeable batteries are still one of the best NiMH AA batteries you can currently get on the market.

The performance of the 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries in our tests:

– 2472 mAh at 0.2A load
– 2453 mAh at 0.5A load
– 2388 mAh at 1.0A load
– 2322 mAh at 2.0A load

– 3.080 Wh at 0.2A load
– 3.015 Wh at 0.5A load
– 2.870 Wh at 1.0A load
– 2.601 Wh at 2.0A load