Our high performance battery chargers enable long battery life by providing 8-stage charging technology and it has precision charging control, constant status monitoring and stringent battery protection. Proprietary design techniques provide battery and circuit protection, small solution footprints, faster charging, 100% standalone operation, improved thermal performance and high reliability operation. Each battery chemistry has unique battery-charging requirements. Selecting the correct battery charger increases the operational run time of the end-product by ensuring that the battery is always optimally charged. Based on 3-stage charging technology, we have state-of-the-art chargers for both Lead-acid batteries and Li-ion batteries. Here is a sample of our 12V1.5A charger
B.Pre-charging：0.3A，to 10V，with max. charge time of 2 hours
C.Trickle charging：0.6A，to 10.5V，with max. charge time of 2 hours
D.Main charging：1.5A，to 13.7V，with max. charge time of 30 hours
E.Secondary charging：1A，to 14.7V，with max. charge time of 4 hours
F.High constant-voltage charging：0.6A，to 14.7V，with max. charge time of 4 hours
G.3 minute test：should be above 12V
H.Low constant-voltage float charging：13.4V, below 0.6A for 1 hour
Koyosonic can help.
We can design and develop exactly against your specific requirement.