Can I use RCR123A rechargeable batteries (voltage 3.7V) to power APEX sights?
The use of rechargeable batteries is an extra option. Before using them, please consider the below listed peculiarities. The sight’s battery compartment is designed for non-rechargeable CR123A batteries. Please pay attention to the physical size of your rechargeable batteries – they are often larger than regular batteries, this does not allow the battery compartment cover to close properly.
The thermal sight shows correctly the charge of regular 3V non-rechargeable batteries (voltage range displayed is 6 – 7.4 V). When using rechargeables (voltage range 6 – 7.4 V), low battery indicator shows false readings: the sight will detect batteries as fully charged even upon extremely low charge level, when the sight is about to switch off.
It is not recommended to discharge a Li-Ion battery below 3V. A rechargeable battery without deep discharge protection degrades after several deep discharges, and the sight will keep discharging them since 6V voltage (two 3V rechargeable batteries) is taken as indication of fully charge.
To increase self-contained operation time, we suggest that you use external power supplies which can be connected to a special port in the sight.
Is it allowed to use the sight attached to the mount with two screws?
Yes. But before use please fix the mount with glue, and fix the screws with a thread sealant.
When shooting the battery compartment cover opens spontaneously.
Most probably the cover has not been closed or has been wrongly closed. This may be caused either by the use of rechargeable batteries of larger size which do not allow the cover to be closed (see above) or due to incorrect sequence of operations when closing the cover.
First, when the cover is removed, turn the knob to the closed position; herewith two spring driven latches appear on both sides of the cover. Install the batteries into the battery compartment, close the cover, press it strongly from upwards (you can push both zones under which the latches are located). The cover should be completely fixed (both latches should be able to fix in sight’s body, one can hear a click). You can easily check it when pressing the cover from downwards (see Pic.).
The most common mistake – the cover snaps only on one side (contact between the cover and the batteries is poor and power failure happens when shooting).
The sight runs on external power but the batteries in the battery compartment discharge.
In this case external power has the priority. Please note that upon full discharge of external power you will have to re-start the sight (the sight does not switch automatically to battery power).
Can I have a description of APEX reticles please?
Please click on the links below to read the description of the APEX reticles:
- Apex XD38 Thermal Sight Reticle Catalogue
- Apex XD50 Thermal Sight Reticle Catalogue
- Apex XD75 Thermal Sight Reticle Catalogue