Aku EverActive 6F22 Krona 9V (550mAh, Li-ion) with internal charger (USB-C)

The offered battery is one of the most powerful and capacious batteries that can be found in the "9V" battery size - the minimum capacity of 500 mAh has been achieved through the use of dedicated lithium-ion cells.
The new Li-ion batteries in the size of a 9V battery with a nominal voltage of 7.4V achieve twice the rated capacities expressed in mAh than their counterparts made in Ni-MH technology. Ni-MH batteries, on the other hand, have a slightly higher average operating voltage (nominal) - usually 8.4V.
Specification:

• type: 6F22 9V, Li-ion,
• dimensions: 26.4 x 48.5mm,
• gross weight of the set: 41g,
• battery weight: 27g,
• nominal (average) voltage: 7.4V,
• operating voltage (min./max.): 6.0-8.5V,
• input (for charging): TYPE-C USB 5V DC, 500mA,
• b. high capacity - max 550 mAh, minimum 500 mAh - according to IEC 61960-3 (7.3.1),
• possible discharges with a very high current of >500 mA,
• Packaging - blister 1 pc.

The battery is charged via an integrated USB-C socket using any USB charger with parameters of 5V DC and a current capacity of min. 500 mA. The maximum charging time using the USB-C socket is approx. 2 hours.

The set does not include a USB-C cable or a USB power adapter.

The battery can also be charged using chargers dedicated to Ni-MH batteries, but in this case the charging time may be significantly extended.