Repost From our official reviewer: Budda
The PB2S is a 2 slot battery charger with power bank with power bank functionality QC3.0 (5V 2A or 9V 2A, max power 18W).
The supported batteries are: Li-Ion 3.6 – 3.7 Volt / IMR / INR / ICR; in the 18650-18700-20700 and 21700 format. Protected 18650 will also fit. It can reset triggered PCB circuits of batteries on both slots.
It is available in different colours, I got my sample in black.
I have almost no knowledge about electronic, however, I’ve been using flashlights, batteries and chargers for 10+ years as a consumer. So in this thread I’ll give you my honest opinion on this product as a user.
In order to fully display the potential of the PB2S, along with it I received a Xtar 21700 4200mAh 45A battery, a 18650 2600mAh 35A battery, and a XTAR USB power source rated QC 3.0 .
The PB2S arrives in this nice box with a cut in to view the PB2S. The PB2S comes with a USB-USB type C cable, and a manual.
The PB2S measures 124 mm in length, 56 mm width and 26 mm thick. The entire surface is rubberised and allows a good grip on the PB2S.
On the Front there is the removable tray cover, and the LCD backlit display.
On the back there are the detailed specs (input, output, usb output, batteries compatible…).
The USB output port, the USB-C input port and the switch are placed laterally.
The PB2S is well built and finished.
The magnetic tray cover works well staying in place protecting the tray and the cells from dust and accidental contacts when carrying the PB2S. The 2 slots are long enough to accommodate most cells.
The USB C / USB ports are universal and allow more current than the micro USB port, allowing for the fastest charge.
Charging the PB2S using a QC3.0 coded power adapter, a Ravpower Smart+ 2.0 charger, and other regular USB chargers without particular coding or rating, I had no problems.
Using the PB2S as a powerbank to charge my cellphone, and other equipment, worked fine even with a single cell.
The possibility to run the PB2S with different sizes of batteries, from the 18650 to the 21700 with 2 independent slots are a plus. Although I would advise a word of caution when putting in smaller cells that for capacity and or chemistry, can not support the 2A charge that could be delivered to them. Similarly, I would advise caution when powering the powerbank function with a single cell that for capacity and or chemistry, can not support the high continuous current discharge.
In my opinion, you can fully exploit the technical advantages of the PB2S if you run it with IMR or hybrid cells, so you can use the fast charging currents to fast charge them, and they can take the high and prolongated discharge current to sustain the highest charging current that the PB2S is able to sustain, especially when running the PB2S with a single cell.
Using quality USB C cable (with the right coding) is also a must, to avoid additional bottlenecks that can diminish the overall performance of the PB2S.
Keep in mind that. Although the % indicated for the single battery is a more or less accurate indication of the capacity remaining for that battery, the average % could not reflect the real capacity remaining in the PB2S if you use 2 batteries with different capacity, because the % estimate is done measuring the voltage of the cell.
For example, carrying an almost empty (10%) 2000mAh 18650 cell, and a full (100%) 4200mAh 21700 battery, will give you an average remaining capacity of around 55%, when in reality you have around 70%.
The other way around: a fully charged 2000mAh 18650 and a almost empty 4200mah 21700 will give you the same average remaining capacity of 55%, when in reality you have around 40%.
This issue can be minimised or nullified if the batteries used in the PB2S have small to none difference in capacity.
The only issue that I have with the PB2S is that when the display doesn’t stay on constantly, but it turns on and off, and stays on every time for around 1 second. That is not enough for me to grasp all the informations (current, voltage, %) in a single cycle, I have to wait for the display to turn on again to read the rest of the informations. Same for the display remaining active, flashing, even when I disconnect the device I was charging.
The PB2S is a 2 slot battery charger with power bank with power bank functionality QC3.0 (5V 2A or 9V 2A, max power 18W).
The supported batteries are: Li-Ion 3.6 – 3.7 Volt / IMR / INR / ICR; in the 18650-18700-20700 and 21700 format. Protected 18650 will also fit. It can reset triggered PCB circuits of batteries on both slots.
It is available in different colours, I got my sample in black.
I have almost no knowledge about electronic, however, I’ve been using flashlights, batteries and chargers for 10+ years as a consumer. So in this thread I’ll give you my honest opinion on this product as a user.
In order to fully display the potential of the PB2S, along with it I received a Xtar 21700 4200mAh 45A battery, a 18650 2600mAh 35A battery, and a XTAR USB power source rated QC 3.0 .
The PB2S arrives in this nice box with a cut in to view the PB2S. The PB2S comes with a USB-USB type C cable, and a manual.
The PB2S measures 124 mm in length, 56 mm width and 26 mm thick. The entire surface is rubberised and allows a good grip on the PB2S.
On the Front there is the removable tray cover, and the LCD backlit display.
On the back there are the detailed specs (input, output, usb output, batteries compatible…).
The USB output port, the USB-C input port and the switch are placed laterally.
The PB2S is well built and finished.
The magnetic tray cover works well staying in place protecting the tray and the cells from dust and accidental contacts when carrying the PB2S. The 2 slots are long enough to accommodate most cells.
The USB C / USB ports are universal and allow more current than the micro USB port, allowing for the fastest charge.
Charging the PB2S using a QC3.0 coded power adapter, a Ravpower Smart+ 2.0 charger, and other regular USB chargers without particular coding or rating, I had no problems.
Using the PB2S as a powerbank to charge my cellphone, and other equipment, worked fine even with a single cell.
The possibility to run the PB2S with different sizes of batteries, from the 18650 to the 21700 with 2 independent slots are a plus. Although I would advise a word of caution when putting in smaller cells that for capacity and or chemistry, can not support the 2A charge that could be delivered to them. Similarly, I would advise caution when powering the powerbank function with a single cell that for capacity and or chemistry, can not support the high continuous current discharge.
In my opinion, you can fully exploit the technical advantages of the PB2S if you run it with IMR or hybrid cells, so you can use the fast charging currents to fast charge them, and they can take the high and prolongated discharge current to sustain the highest charging current that the PB2S is able to sustain, especially when running the PB2S with a single cell.
Using quality USB C cable (with the right coding) is also a must, to avoid additional bottlenecks that can diminish the overall performance of the PB2S.
Keep in mind that. Although the % indicated for the single battery is a more or less accurate indication of the capacity remaining for that battery, the average % could not reflect the real capacity remaining in the PB2S if you use 2 batteries with different capacity, because the % estimate is done measuring the voltage of the cell.
For example, carrying an almost empty (10%) 2000mAh 18650 cell, and a full (100%) 4200mAh 21700 battery, will give you an average remaining capacity of around 55%, when in reality you have around 70%.
The other way around: a fully charged 2000mAh 18650 and a almost empty 4200mah 21700 will give you the same average remaining capacity of 55%, when in reality you have around 40%.
This issue can be minimised or nullified if the batteries used in the PB2S have small to none difference in capacity.
The only issue that I have with the PB2S is that when the display doesn’t stay on constantly, but it turns on and off, and stays on every time for around 1 second. That is not enough for me to grasp all the informations (current, voltage, %) in a single cycle, I have to wait for the display to turn on again to read the rest of the informations. Same for the display remaining active, flashing, even when I disconnect the device I was charging.
