Johnson GC6120, JC6100 battery replacement sealed lead
Rechargeable 6-volt 10ah batteries, this battery pack is used in may devices like computer backup and portable medical equipment, Johnson GC6120, JC6100 replacement sealed lead

• Johnson GC6120 battery
• Johnson JC6100 battery

These are very tough batteries but must be kept charged. do so when it arrive and use, if its not being used for long periods then a recharge every 6-weeks will be required
If they are being fitted in something like a alarm system with its own mains connected power to recharge then this will take care of the batteries needs far better than you which will be evident with the length of time they last in such circumstances
Johnson GC6120, JC6100 VRLA AGM sealed lead acid replacement
Battery Type: Sealed Lead Acid, VRLA, AGM

Battery Voltage: 6-volts
Battery Capacity: 10ah

Dimensions of this compatible
Johnson GC6120, JC6100 battery are as follows
Length = 151mm
Width = 51mm
Height = 94mm