Watson NP-BX1 Lithium-Ion Battery Pack and AC/DC Charger Kit

The charger depending on how depleted the battery is will charge the battery in approximately 2-6 hours.

Yes, a light is red while charging, changing to green when charged. The charger works well with either Watson or Sony batteries. However, the Watson B-4234 batteries are slightly different in size from the Sony NP-BX1 they are supposed to replace. Sometimes I can wiggle them until they latch in my Sony RX100-VI, but today, I can't get them to stay in after several tries. I recommend paying the more exorbitant price for the Sony batteries.

Yes this battery will be compatible with the Sony HDR-CX440 HD Handycam.

The Watson NP-BX1 Lithium-Ion Battery Pack (3.6V, 1150mAh) is compatible with the Sony RX100 VII Digital Camera (B&H # SODSCRX1007).

I purchased the Watson NP-BX1 battery for my Sony RX100 VI and it works just as well as the Sony batteries. The camera is hard on batteries and I usually carry 3, particularly if I plan to use my camera all day. The only issue I've had with the Watson battery is that I find it easy to place in my charger incorrectly. Fortunately, the charger then blinks rather than going into charging mode.

Yes ihave both the charger and the same Sony camera

I am having trouble charging this battery with a Sony charger.

I am not exactly sure, but if it fits into the battery space and has the same voltage I would say yes