BatteryTrader battery compatible with APC DLA1500RM2U Computer back up UPS Batteries AGM VRLA There are four 12v 7ah batteries in this pack Valve regulated sealed lead acid, AGM Length = 151mm Width = 65mm Height = 94mm More details Our batteries are sealed AGM type which means they are non-spillable, not-hazardous, recyclable, rechargeable and safe for air transport (although always ensure you check with the airline you are taking them on). Valve regulated sealed lead Acid, VRLA, with AGM technology, they will not spill and can be safely mounted on their side, found in many applications. A little help on installation: Once you receive your brand new batteries it is fairly straight forward to swap them with your old ones. Battery Care: Battery care is quite simple if you follow a few basic rules. To begin with, fully charge upon delivery and before first use until they are full (should be no more than a few hours), it doesn’t take very long as we ensure our batteries are kept at a high charge. Secondly and most importantly, make sure you charge until full after every use, a fully charged battery will keep that full charge for a good couple of weeks so no need to recharge if it’s not in use for a week. Lastly, if they are not being used for more than 4-weeks then a top up charge will be needed to keep the cells fresh. These batteries are for the standard size 12v 7ah with the sizes quoted above.