Charge it, dive it, put a partial charge on it if you run it until it battery cutoff or reaching the reduced power mode in the last 5-10% of the battery. Other wise, don't bother charging it until your next dive. If storing for a couple months or more, charge batteries to approximately 30 volts and disconnect from tail.
Spares are an extra set of o-rings for body and test port, spare locking strips, spare rubber band for keeping debris and mud out of o-ring joint area and spare tow point to change from vertical to horizontal tow cord configuration.
There is a webbing handle on the nose in almost all the pictures that can pull forward over the front for towing. You can either clip a double ender on or install a permanent boltsnap on.
The Genesis goes into a reduced power mode when the battery capacity drops to approximately the last 5-10%. Limits power to 300 watts which is about 40lbs of thrust and still higher than normal cruise power.
Going from fresh to sea water requires re-trimming the weight inside. Most people doing this frequently have one set of weights for each and just swap them out.
If properly cleaned, greased and assembled, the Genesis can stay closed for years. Inspect the seals for damage (replace if damaged), clean sealing surfaces, grease and close it up. There is a test port plug on the nose for pressure testing if needed. -4 o-ring boss, same as high pressure port on 1st stage reg.
No annual maintenance is required, just rinse well after use in seawater and slide the rubber band away from the body/tail connection to allow the area to drain.
No firmware updates.
No, we use a true mill spec hard anodize, color options are black or a grayish/baby poop brown. Anyone offering other colors are not using a full .002" thick hard anodize.
PM me your email and I'll forward a manual
No changes are in the works for 2018, except the SW, which is getting an even bigger motor and more nozzle inlet clearance.