Einhell RG-CH-18-Li-5ah powertool battery Li-ion 18v.
Replacement Einhell RG-CH-18-Li-5ah battery packs, rechargeable compatible cells that run at 18v they have a internal storage capacity of and a Watt hour capacity of 90Wh, Li-ion cordless power tool batteries supplied at low prices direct from warehouse

This web page outlines details of a replacement battery pack for the Einhell RG-CH-18-Li-5ah with a capacity of (Watt hours are also quoted further down the page) 5000mAh, these Li-ion Black cordless power tool batteries, also you will find information below on the chemistry type and dimensions

• Einhell RG-CH 18 Li 5ah battery

This is a Li-ion battery, Lithium-ion is also shortened to LIB, a very popular battery type used in many devices, they offer a high output from a seemingly small size factor and often seem in cordless devices, do not overcharge Lithium batteries, do not use if the battery pack is damaged
Rechargeable batteries will always lose a bit of energy every day even though Li-ion are far better than many chemistry types you still need to treat them well if you want them to look after you, charge fully when you receive them ( a very important step ) and before first use, if there are extended periods where they are not being used then charge before putting away and every 8-12 weeks, unless you have a good charger do not leave on charge for more than 24-hours.

This battery is for the
Einhell RG-CH-18-Li-5ah

If you have not already checked your old battery serial codes then do so, this is only a guide, the physical dimensions of this compatible one are listed here on the page

Voltage = 18V
Capacity = 5000mAh
Rate = 90Wh
Chemistry = Li-ion
Colour = Black

There is one rechargeable batteries as used in the Einhell RG-CH-18-Li-5ah the physical size of the individual batteries are as follows
Length = 221.7mm
Width = 69mm
Height = 102.88mm