This user-friendly charger provides useful information. This way you can determine what is happening with your battery and what stage the charge is at. For example, in the final stages of charging, SLA increases to 13.6V and LiFePo4 to 14.4V. Also, the ability to adjust the amperage, AMPS, from 7 to 3.5 is useful for small batteries, so as not to overload these batteries damage and shorten their lifespan. I have a small 10Ah SLA battery that I built a power supply around and with any lead acid battery it is best to charge it to around 30% of its amp capacity. In this case it is 3 amps. I thought 3.5 would be close enough. Charges my 16Ah LiFePo4 battery very quickly with 7 amps.