The NP-FW50 is a common, if not too small battery for the older line of Sony DSRL, and as such, will discharge much faster than their latest upgraded counterparts. That means a constant cycle of them is required to keep your setup (which by now, in 2023, is old), going.

This double charging dock is handy - not least for having more recent USB-C compatibility so more modern cables are compatible. There’s a snug fit for the battery to ensure maximum contact without slippage, helping to ensure minor knocks won’t cut off your charge halfway through.

Now there are some downfalls: Firstly, it’s likely you’ll need a laptop with a USB-C port handy to plug the charger into - there’s no wall adaptor, which is fair play considering we’ve lived through a generation of having wall adaptors packaged with every device sold to us, so it’s almost certain you will have one spare (or an alternative USB Micro cable lying around); but also, despite an improved USB interface, the charging voltage isn’t increased, with 700mA charging one battery still being decreased to 500mA when charging simultaneously.

This K&F’s charger form factor also shares a peculiar familiarity with my Neewer charger, down to base shape, charging display and port positioning, with the labelling for this one including double insulation logos. Reassuring, but with the other similarities, who would notice the difference.

A handy spare charger stripped back to just the basics - make sure you’ve the spare charging ports or a wall adaptor free though!