AGM Lead Acid Batteries VS Lithium Ion

Lead Acid Vs Lithium Ion


Whether Lithium Ion Batteries or AGM Lead Acid Batteries Are Better For Battery Backup Systems


There are many controversies on whether a Lithium Ion Battery is better suited than an AGM Lead Acid Battery. The first question you have to ask yourself is, what am I using the battery for? Here at Medi-Products, we use our batteries for backup-standby power systems which means that we need our batteries to go long periods of time without being used.  These batteries also need to be able to discharge the amount of power in over a short time when they are being used. For our particular situation, there are many advantages to using AGM Lead Acid Batteries over Lithium Ion.  

  •                   -Lead Acid Batteries are cheaper to manufacture and simple to make which means that our customers pay less for their product.  
  •                   -Since this technology has been around for a while, it is mature, reliable, and understood which means the maintenance is fairly low.  
  •                   -Lead Acid Batteries are capable of high discharge rates and low self-discharge rates. 

While there are many advantages to lead acid batteries, there are also many disadvantages to lead acid batteries if they are used in other environments and uses. 

      •                  -They have a limited “Usable” capacity, which means it is typically considered wise to use only 30% - 50% of the rated capacity. 
  •                  -They have limited cycle life, which means that even if the user is very careful to never over drain the battery, they still are only good for
  •                    500-1000 cycles. 
  •                  -They have a slow and inefficient charge. 


However, most of these disadvantages do not apply to the need we are filling and the equipment we support. This is because our battery backup systems don’t disperse power until the electric goes out. This means that our batteries are not regularly being discharged, so they do not need to be recharged and the battery only drains once. Lithium Ion batteries are great for solar systems, but they too have their advantages and disadvantages. Some advantages are: 

  •                  -They have low maintenance 
  •                  -They have a low self-discharge rate 
  •                  -They have a high energy density 


Some disadvantages of these batteries are: 

  •                  -Requires a protection circuit 
  •                  -The batteries are subject to aging if not used 
  •                  -They only have a moderate discharge current 
  •                  -They are subject to transportation regulations 
  •                  -They are expensive to manufacture 
  •                  -They are a newer technology, so they are not fully mature 


Both Batteries have their advantages and disadvantages allowing them to have two different primary uses. Below is a table of some of them: 

Lithium Ion Uses 

Lead Acid Uses 

Solar Energy 

Hand Held Devices (I.e. cell phones, tablets) 


Battery Backup Systems 


Fire and Security Alarms 







 In conclusion, while Lithium Ion batteries are great for most things like solar energy, phones, and computers, they are not the best option for our battery backup systems.  At Mediproducts, we choose the best possible solution so that our customers can rely on our backup solutions.