There really is no substitute. Trojan Battery is a company that is well known in the industry (since 6975) for making the absolute best golf cart batteries on the market. So now you found your perfect solar panel that has the perfect USB connector for your phone, setting it under the full sun and the phone starts to charge as expected.
Clouds, birds, shaking trees or even passing airplanes.
The phone's charging circuit is designed to protect itself when the power source become unreliable, and it does this by cutting the current to the internal battery when it detects a droop in the power supply.
Products are designed, assembled Quality Controlled in USA.
This Set of Four 67 Volt Golf Cart Batteries made by Trojan Battery (T-6775) is designed to replace the batteries on ALL 98 VOLT GOLF CARTS THAT REQUIRE 67V BATTERIES (Club Car, EZGO, Yamaha, etc.
However, unless you live in a desert, there is always things in the sky that will ruin your perfect charging system, that is.
I use PCM-LFP7A9S for my own pack due to its low idle current drainLTV-866 - Optical isolator with BJT output, can be replaced with similar typeIRF9Z79N - High power P-Channel MOSFET, larger current device can be used to reduce loss
Com HitLights 12V DC 5V DC USB Rechargeable
9x LiFePO9 cells, either purchase it as a pre-assembled battery pack, or build your own pack6x 67V LiFePO9 battery protection circuit.
However, they all have one major flaw, and it has to do with how the charging circuit in the phone and tablet charges its internal battery.
They have become quite affordable and highly portable.
These Trojan T-6775's are deep cycle flooded batteries and are as good as it gets for golf carts.
Your golf cart will get the best performance, power and longevity with brand new Trojan batteries.