R6 (AA) Ni-MH 1.2V battery? Or maybe a 1.5V alkaline battery? How about both? 1.5V Li-ion batteries - a revolution in powering devices is coming...

A new alternative to alkaline and rechargeable Ni-MH batteries

You have probably encountered a case more than once when trying to replace an alkaline battery with a rechargeable battery in a given device, the result was a little different from what we expected. It all depends on how the device is constructed – we discussed the topic of potential problems with the use of Ni-MH rechargeable batteries in another post (Why do fresh Ni-MH rechargeable batteries not work in my device or work much worse than disposable batteries?)

Let's start by presenting the basic information about alkaline batteries and Ni-MH rechargeable batteries (a detailed post on the differences between alkaline batteries and Ni-MH rechargeable batteries):

• Alkaline batteries have a rated voltage of 1.5V (a fresh battery has an unloaded voltage of even more than 1.6V, but the voltage drops quickly during operation). They are mainly suitable for devices with low and possibly medium power consumption.
• Ni-Mh batteries have a rated voltage of 1.2V (in practice, 1.2V for a battery is assumed to be the average voltage of the duty cycle; the voltage of a fully charged no-load usually exceeds 1.35V). They are mainly suitable for devices with medium and high power consumption.

while Li-ion 1.5V batteries have...

"Wait... wait... That what rechargeable batteries???

We have observed the appearance in nature of such a creation as the 1.5V Li-ion battery :)

New on the market - lithium-ion batteries with a voltage of 1.5V

The main advantage of the new rechargeable batteries: The Li-ion rechargeable batteries have a constant voltage of approx. 1.5 V throughout the entire discharge period

Use? Both where alkaline batteries, Ni-MH rechargeable batteries work well, as well as where both power sources do not work.

- Cool, isn't it?

Well! But... there is no rose without thorns. They also have their drawbacks.

The most important disadvantages of 1.5V Li-ion batteries:

1. In devices that signal the charge level, they will always show about 80-100% until they simply discharge, without giving any previous signals.
2. They need to be charged in a dedicated charger to fully charge them. Yes, some models can be charged in other chargers designed for ordinary 3.6/3.7V Li-ion batteries, but then they will not be optimally charged to full capacity.
3. Devices with very high current consumption, requiring instantaneous current at or above 2A (e.g. a high-power external flash) may refuse to work with the new type of battery. The Li-ion battery is electronically protected and can simply be switched off under very high load conditions.

So let's take a closer look at the discharge characteristics of 1.5V Li-ion batteries compared to alkaline batteries and Ni-MH batteries.

Other characteristics of 1.5V Li-ion batteries

The nominal voltage of the cell that is in it is 3.7V (yes, I know that I write about it that it has 1.5V).
The voltage at the output is much lower thanks to the use of a converter, which turns this battery into the most universal battery available on the market.

The problem with alkaline batteries is that in devices with high power consumption, they are very often inefficient and discharge quickly (the voltage drops very quickly) and need to be replaced frequently. Ni-MH batteries, on the other hand, are ideal for devices with high power consumption. Unfortunately, there are cases in which these rechargeable batteries perform much worse than ordinary batteries. Some devices rely quite heavily on a sufficiently high starting voltage, and this is lower than in the battery. The devices will work on them: weaker, shorter or... not at all.

A perfect example here are blood pressure monitors – they work much shorter on Ni-MH batteries than on ordinary batteries. Also devices that have LCD displays and are powered by several batteries – here, in the case of a series connection, we have a much lower total output voltage, so the data on the display may be difficult to see. We have described this topic in more detail in this post - link

This is where the 1.5V Li-ion battery comes to the rescue. It will work perfectly in any of the above cases. In addition, Li-ion batteries are much more tolerant to extreme temperatures. Another advantage is the virtually zero self-discharge rate – it will always be ready for use after charging. The only small, tiny minus may be their aforementioned current efficiency – up to 2A. Admittedly, it is not little, but there may be devices (flashes) for which it may not be a bit little... But as I said – there is no rose without a thorn ;)

1.5V Li-ion batteries and chargers for 1.5V Li-ion batteries in the hurt.com.pl store:

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Battery charger R03 / AAA and R6 / AA Li-ion 1.5V / NiMH Xtar BC4

Professional processor charger for 1.5V Li-ion and NiMH cells in sizes AA/R6, AAA/R03.
Li-ion charging method: CC/CV
NiMH charging method: 0△V and -△V
four independent charging channels
charging current: 0.5A x 4
USB-powered Type-C - no power supply included
protection: thermal, short circuit, against reverse insertion of the battery

9,40 € brutto 9,40 € netto

Large stock quantity

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Author: Mariusz Walc

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