I need to <span class="colour" style="color:rgb(60, 64, 67)">identify 2 components on the this PCB (on the pic). Please be kindly to help me.</span>  <span class="colour" style="color:rgb(60, 64, 67)">1\. AL W84 \(SOT\-89\) </span>(U3 and U4)<span class="colour" style="color:rgb(60, 64, 67)"></span> <span class="colour" style="color:rgb(60, 64, 67)">2. </span>43B1 (SOT-23) (U1 and U2) Its a battery passive balancer for LFePO4 for one element (3,65V). Its have 2 steps for balancing - little current and big current. Maximum current is 0.53A.