Rechargeable or lithium batteries,lead acid battery high internal resistance questions,solar battery charger 12 volt reviews - Downloads 2016

19.02.2015
Your use of this website constitutes acknowledgement and acceptance of our Terms & Conditions. The Kentli AA Lithium-Ion cell was perceived as an exciting development, because all Lithium Ion cells are normally 3.7 volts.
As Chinese Industry is prone to do, Kentli did some slight-of-hand marketing with these products. The street price for these Kentli AA cells is about US$11 per cell, and the charger about US$20. We bought 12 AA cells and 2 chargers to give these units a workout in our Lectrosonics SMV transmitters. This is about the time that the Kentli AA cells stopped delivering 3 hours of power to the SMV’s.
UPDATE : Curious about the quiescent current draw of the Kentli Cell, on its own, we hooked up a micro-amp meter between the regulator board and the Li-Po cell.
This entry was posted in Location Sound, Location Sound Gear Deconstruction and tagged 1.5V, AA, cell, kentli, lithium-ion, location sound, rechargeable, txsound, verrando on October 24, 2014 by pete verrando. If you are in search of the very best AA battery currently available then you won’t go wrong with the latest generation of AA lithium batteries. Without going into too much technical detail, when we refer to the lithium battery we are often meaning the Lithium perchlorate battery which derives its name from the chemical used alongside the lithium that is used to create the voltage we require.
It therefore goes without saying that these lithium cells are in a totally different class to any other technology that preceded the alkaline battery (such as zinc-chloride etc.) Due to the complex manufacturing and rigorous testing process that lithium batteries must go through to ensure they are safe to use and dispose of, they quite understandably cost several times more than low-end batteries that are typically seen in local stores and supermarkets and this is something that can really dissuade people from making the change from either alkaline or NiMh to lithium battery technology. As a general rule of thumb, if you wish to power a device that is expensive, that you wish to keep for a medium to long term and has a fairly high power drain then it will make sound financial and economic sense to make the investment into lithium AA batteries. So even if the cell could fit into the AA form, the voltage was too high for 1.5 volt applications.


Lithium Ion cells maintain almost their rated voltage right up till they die  Other cells, the voltage slowly drops as the cell discharges.
For their weight, Lithium-Ion cells currently provide the most deliverable power than any other type of cell.
Rechargeable batteries create income, as you can bill the client for these batteries like disposables.
They listed the capacity in milli-watt-hours, so they could print that big 2800 mWh on the side of the cell.
In my application, Kentli AA’s take their internal cell from a full charge to near-exhaustion in every cycle. And obviously, in the SMV, a rechargeable will run for only 3 hours, and a AA li-ion disposable will burn for 5 hours. A typical AA lithium battery will outperform even the highest grade and respected brands of alkaline battery by a massive margin and will even greatly outperform the highest milliamp-hour rated NiMH best rechargeable batteries. If on the other hand the item you wish to power is a low end, cheap device or perhaps a toy from the Far East, it is very unlikely that you will be able to justify the increased cost to yourself. They are shipped directly from China through a few distributors, including sellers on ebay. I would guess I got about 100 charges on my Kentli’s before they began to show signs of expiration. This is because items such as toys tend to be used infrequently, do not consume a lot of battery power (i.e. The Kentli sees this quiescent current, and therefore keeps its motherboard alive, affecting a continuous drain on its cell. And no telling of what’s to become of my little AA canisters for a location sound mixer on the road!


A Lectro SMQV would treat the cells more gently, distributing the current draw between two cells, and possibly resulting in better performance. So leave a freshly charged Kentli in the SMV overnight, and it will be dead in the morning. In a less-demanding environment, (like an LED flashlight or an ipod dock) they may give better service. It would probably be cheaper to replace the batteries in a toy such as a light-up music playing elephant for example, with cheap alkaline batteries a couple of times before the toy breaks than to buy something like Energizer AA lithium batteries.
But Kentli claims their cell lasts as long as the Ni-MH, because the regulator allows the 1.5 volts to be maintained till the cell is completely exhausted.
I use it as a drop-weight when running the lav cable down shirts and blouses and pant-legs. This is because in all honesty the battery will probably outlive the toy and you would end up throwing the toy and batteries away before the batteries were exhausted.
They require extra time to sort and charge and check at call and wrap.  They create a level of uncertainty in the production process. The SMQV is almost as large as a UM400A, Lectros classic 9-volt transmitter, of which I already have a shit-ton. The charger consists of a very flimsy switching power supply converting your AC house current to 5 volts DC. The flimsy switch-mode supply was the obvious culprit, so it was replaced with an outboard 5 volt phone charger, of much more robust design.



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Comments Rechargeable or lithium batteries

  1. dj_maryo
    Complaint facing the sir, my leptop.
  2. Tonny_Brillianto
    Came with something decided to buy a new battery on the basis that if the alternator.
  3. KAMRAN_17
    Well before the end of its lifetime, as finding suitable.