Deik ZB 1516B 6INR 19/65 battery pack. It is a lithium-ion battery with a rating of 21.6V DC, 2000mAh, and 43.2Wh. The text on the battery also indicates that it should only be used with a YINLI YLJXA-T260040 charger. Based on the information on the battery, it appears to be a replacement battery for a Deik vacuum cleaner. The capacity of the battery is 2000mAh, which is a common capacity for cordless vacuum cleaner batteries. If you are looking for a replacement battery for your Deik vacuum cleaner, you can search online for "Deik ZB 1516B battery" to find compatible batteries. G2-Drew