The ViFly WhoopStor V2 is probably one of the most feature-rich 1S Lipo chargers on the market right now for tiny whoops. It can storage charge your batteries and supports both PH2.0 and BT2.0 connectors.
Where to Buy?
Update (May 2023): There is a new version, Whoopstor V3!
You can get the WhoopStor V2 Charger from these vendors. Make sure to get the V2. If you have the WhoopStor V1, you can try to email ViFly customer support and arrange a free upgrade to the V2, however you have to pay for the postage as far as I know.
- AliExpress: https://s.click.aliexpress.com/e/_Dm8zFj7
- Amazon: https://amzn.to/3zL6sCf
- GetFPV: https://oscarliang.com/product-s65u
- RaceDayQuads: https://oscarliang.com/product-2rst
- Newbeedrone: https://oscarliang.com/product-52uz
WhoopStor V2 Specifications
- Input connector: XT60, DC(5.5*2.1mm), USB-C(PD3.0, QC2.0, BC1.2）
- Input voltage range: 7V-21V (XT60 2S-5S Battery), 9V / 12V (USB-C）
- Max input power: 30W
- Max charging current: 0.9A/port
- Battery Connection: PH2.0 & BT2.0
- Battery type: LiHV 4.35V / LiPO 4.20V
- Storage voltage: 3.85V
- Max discharge power: 1W/port (0.26A at 3.8V)
- Dimensions: 101x49x22mm
The Pros and Cons of WhoopStor V2
The WhoopStor V2 has 6 output ports, it can charge up to 6 batteries at the same time. The 6 ports are independent of each other, so it doesn’t matter what voltages the 6 batteries are at when you plug them in. Although there are two connectors for each port (PH2.0 and BT2.0 connectors), you shouldn’t connect two batteries to the same port, only 1 battery per port is recommended.
It has both BT2.0 and PH2.0 connectors, these are the two main battery connectors tiny whoops use these days.
It has a nice LED screen that displays the voltages of all batteries, the input voltage and charge current.
The biggest selling point of the WhoopStor V2 charger perhaps is the ability to storage charge and discharge LiPo batteries. This is one of the very few 1S LiPo chargers that can do this.
That’s where the name of the charger came from, “Whoop” as in Tiny whoop and “Stor” as in “Storage charge”.
Why is storage charging so useful? Well, often you don’t get to use all of your fully charged batteries, leaving them fully charged for too long is bad for battery health and performance. Therefore it’s best to discharged them and bring the voltage down to 3.85V – the storage voltage. Sometimes you don’t want to leave your batteries empty for too long either, and you can bring them to storage voltage, and that will speed up charging the next time you use them.
Discharging speed is decent, at 3.8V the discharge current is up to 0.26A, which would take about 30-40mins to bring a fully charged battery (4.35V) to storage voltage (3.85V)
Because of the discharging capability, there is a huge heatsink on the bottom of the charger for cooling. However the WhoopStor V2 doesn’t have rubber feet so it’s not very stable on hard surface.
It supports both regular LiPo and HVLi Battery (4.20V and 4.35V), you can select it by simply using the slider switch.
You can power this charger via USB-C, XT60 and or barrel connector. It takes 7V to 21V (2S to 5S), unfortunately it doesn’t support 6S LiPo input.
How to Use Vifly WhoopStor V2 Charger
Charging is easy, simply long press the only button on the charger to activate charging on all ports.
You can hot swap the batteries after the charging has started, and the charger will automatically detect the battery and charge it. You don’t need to wait for all the batteries to finish charging. To stop charging, simply unplug the battery or long press the button again, that will stop all the ports from charging.
You can change the charge current between 0.2A and 0.9A (with 0.1A increment) by single pressing the button while it’s not charging. Unfortunately charge current applies to all port, you can’t adjust it for individual port.
Each port has an LED indicator:
- Off: not charging
- Red: charging
- Flashing red: nearly fully charged
- Yellow: Storage charging
- Flashing yellow: nearly finish storage charge