24

Now add to them also those salespeople that I showed you along with the links in the posts above. Then you will also find a whole bunch of exactly the same, just lesser known “PLB”. And they all have their own personal production with a turnover of about two million batteries per year, including completely identical versions of the “INR26650-50A and INR26650-55A. Even the shell is almost the same for everyone, but they all say that they make these elements independently in their own production. Often, even the characteristics with the description for these INR26650 are made as a copy. And this is true, because the main source of material for all is the same and structurally they are all twins.
The question is only one, the final product of which in the end turns out better. Shockli chose PLB manufacturer. And another of his competitors chose the neighboring manufacturer INR26650. Or also signed a contract with the same PLB, who knows them for sure. Items for ”Shockli-5500” bought from PLB. But, for the “Shockli-5250”, apparently they have now been selected from some other kindred PLB. Look, despite the number of the approximate value of mAh and the high current usage of both models 5500 and 5250, the graphs of their unloading noticeably differ from each other. In general, if you can order items directly from PLB itself, then why search for Shockli objects, overpaying for a simple new label, which inside the battery will still not be visible? In addition, there are suspicions that when buying batteries in order to reduce costs, Shockli asks the manufacturer not only for the absence of a factory label, but also prefers to place an order with a cheaper protective membrane (disables the contact of the element during an overload). That is why on the graphs we see a sharp drop under load at the very beginning of a more or less noticeable discharge in the form of a bag hanging down and then rising back, and even higher than the former.
This is the effect of poor contact of the protective plate, because of which it quickly overheats and only after this heating has good conductivity. This is reflected in the subsequent rise of the discharge line on the graphs after its entry into the bag. At the same time, completely unnecessary heating of chemistry occurs in the region of this membrane, which adversely affects the resource and durability. And such elements cannot be connected to a battery with a large number of cells at all, since they very quickly lose the balance of voltage and mAh. The usual internal BMS with its small balancing currents can not cope here.
In short, these are individual power sources, which are suitable only for smoking cigarettes, that is, they will be there good for what they are intended. And for different flashlights. For good such powerful flashlights, they also fit perfectly :slight_smile: