The RadioMaster Lithium Battery Pack for Transmitters is a promising addition to the market with its 3.7V 2500mAh capacity and compatibility with Radiomaster TX16S, TX16SE, and TX18S transmitters.
As a rechargeable battery pack, it offers convenience and reliability for extended use.

When put to the test this battery pack performed admirably, providing ample power for multiple transmitter sessions without running out or needing to recharge. The 18650 lithium battery is a durable and long-lasting option, and its compact size makes it easy to handle and insert into the transmitter. However, it should be noted that the battery tray may slide around which can be remedied by adding a strip of 3M weather stripping foam around the outside.

One potential downside to keep in mind is that the shipping time can be longer than expected as reported by some customers. However, overall reception has been positive, with many users praising the batteries' compatibility with Radiomaster transmitters and their long-lasting power supply. It should also be noted that while these batteries may not have the highest capacity on the market, they offer a reliable and safe option for those who prioritize stability over maximum power output.

All things considered the RadioMaster Lithium Battery Pack for Transmitters is worth considering for those in need of a rechargeable battery pack for their Radiomaster transmitter. Its compatibility and reliability make it a solid choice, though potential shipping delays should be taken into account when placing an order. In my opinion, this battery pack offers a trustworthy power source for extended transmitter use.