How to calculate Hub 2, Hub 2 Plus, or ReX 2 operation time from the portable battery when connecting via 6V PSU


The battery life of the central panel or range extender when operating from 6V PSU depends on the following parameters:

  • Stability of the Internet and mobile communications
  • Number of active communication modules
  • Battery voltage and capacity
  • Battery leak current
  • Ambient temperature (depends on type and model of a battery)
  • Server ping interval

Also, the battery life is slightly affected by the number of devices connected to the hub or range extender and Jeweller settings.

Calculator of Ajax central panel / range extender portable battery life

(write 0 if you don't know)

* This is an approximate estimated time based on device power consumption and battery parameters with the standard server ping intervals. Keep in mind that it is affected by the factors listed in this article, as well as by natural battery degradation.

Note that battery life depends on a broad range of factors making the calculations approximate.

Do not connect batteries with an output voltage 12 V or higher. This may lead to device damage.

Batteries and hub / range extender operation basics

A battery is a chemical power cell that is affected by the ambient temperature. The lower the temperature, the slower the chemical processes, and the lower the battery capacity. If possible, install batteries in locations with the ambient temperature above 0℃.

Actual battery specifications may differ from those stated by the manufacturer. Even batteries from the same batch may have different capacities, output voltages, or even may be defective.

When using portable batteries, do not activate settings that unnecessarily utilize the hub or range extender radio module. It refers to the Always Active mode and the reduction of the detector ping interval.

Use only qualitative batteries from known manufacturers. These batteries are more expensive and have longer life. If possible, connect batteries only from the recommended list.

We recommend using zinc-air alkaline batteries for extended battery life. Before connecting this battery type, make sure to remove the stickers from it or open the air shutoff valves. If possible, leave the battery with access to the air for 2 hours. This will trigger a chemical reaction inside the battery and ensure proper operation.

To ensure longer hub or range extender battery life, disable unused communication channels. For example, disable Wi-Fi in the hub settings or Ethernet in the range extender settings if you are not going to connect this communication channel.

It’s not recommended to install the hub in places with unstable mobile communication. This affects hub operation time from the portable battery the most.

Keep in mind that the hub or range extender stops working from the portable battery if its voltage drops below 3.5 V. Even if the portable battery still has the capacity, the hub or range extender will not be able to work from it.

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