mode succinct job

The product works but the user manual is too succinct. We would like to know what are supposed to diodes, it stops charging when the voltage is reached or whether to monitor the charging time ourselves etc ..... otherwise it goes.
I change this comment this Feb. 12, 2015: batteries began to "sink" as trivial non-rechargeable batteries low end. I had to throw them well before exhausting the number of recharging cycles hoped disappointment ..... ......