The KUULAA KL-YD78 power bank has a 14,000 mAh capacity and provides up to 100 W through USB-C. It can power compatible laptops as well as phones and tablets. This is an overview of its specifications and features, not a hands-on test.
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Capacity, dimensions and weight
The KL-YD78 uses a lithium-ion battery. Measuring 140 × 44 × 34 mm and weighing 330 grams, it fits in a backpack or larger handbag.
The 14,000 mAh capacity provides a reserve for recharging a smartphone more than once. The actual number of charges depends on the device's battery capacity and energy losses during transfer. For a laptop, the result also depends on its power consumption and battery size; the power bank may not be enough to charge it fully.
Power and ports
The power bank has one USB-C port and one USB-A port:
- USB-C output: Up to 100 W, suitable for compatible laptops as well as other devices.
- USB-C input: Up to 45 W for recharging the power bank itself.
- USB-A output: Up to 22.5 W for charging compatible mobile devices.
The USB-C port can therefore be used both to recharge the power bank and to power a connected device. The available power depends on the device's requirements, the supported charging protocol and the cable used. A suitable USB-C cable is needed to use the higher power output. The maximum rating does not mean every device will charge at 100 W.
The available information does not specify power limits when both ports are used at the same time or how long the power bank takes to recharge.
TFT display
A TFT display on the front shows the remaining capacity, current output power and estimated charging time. This lets users check the power bank's status without an app. The time estimate may change during charging.
Protection and passthrough charging
The model has protection against overheating, overvoltage, short circuits and overload. These features help reduce the risk of damage, but they cannot guarantee that damage will never occur.
It also supports passthrough charging, so the power bank can recharge while powering another device. This can be useful when only one power outlet is available and both the power bank and a phone need charging.
Compatibility and charging protocols
The KUULAA KL-YD78 supports PD, QC, AFC and SCP charging protocols. These help the power bank and connected device agree on suitable charging parameters.
Brands listed as compatible include Apple, Samsung, Xiaomi and Dell. Brand compatibility alone does not guarantee the same charging speed for every model. Before using it with a laptop, check the laptop's USB-C power requirements and choose a suitable cable.
Based on its specifications, the KL-YD78 is particularly relevant to users who want one power bank for a phone and a compatible laptop, with a display for monitoring charging status.
