Review on ☀️ SUNYIMA 10pcs Mini Monocrystalline Solar Cells Kit - 2V 160MA Solar System for DIY Charge Solar Panels by Carlos Alston

As for me, I connected 3 of these in series with the TP4056 charging board. This makes them a suitable charger for today's ubiquitous lithium polymer batteries. Or you can just build two of these, with no charging board to charge 4 volts, and leave them semi-automatic to charge things like 18650 batteries that are so ubiquitous these days. Therefore, they don't get fully charged, but they don't get recharged either. Good size, good performance, good durability, good price! They fit perfectly into most projects and most budgets =)