On 1/23/2020 12:52 PM, wrote:
On Thursday, January 23, 2020 at 9:10:56 PM UTC+1, sms wrote:
On 1/22/2020 11:40 PM, wrote:

snip

No battery light with the normal 4-5 AA penlights batteries put on as much light on the road after 1.5 hour (!) than my current EdeluxII headlight with my SONdelux dynohub so I decided I will sell my current dynohub wheel and buy one with a dynohub for through axle before the next winter. Bummer. As always YMMV.

A battery light with 4-5 AA cells is not a "normal" battery powered
light. A Duracell Alkaline AA cell at 1.0A discharge rate is rated at
about 500mAH. You do better with AA NiMH batteries, three Eneloop 2550
mAH batteries in series would give you 2250mAH at 3.6V.

The Oculus light uses a user-replaceable 4500mAH 26650/3.6V battery.

The GACIRON V9D-1800 uses two non-user replaceable 3350mAH 18650
batteries for 6700mAH at 3.6V.

The Lezyne Megadrive 1800i has two non-user replaceable 18650 batteries,
not sure of the capacity (actually you can replace them yourself if
you're willing to solder a connector onto a replacement pack).

All will put out far more elight than your EdeluxII, for a lot longer
than 90 minutes. If you run them on maximum power you'd only get around
1.5 hours, but maximum brightness is only necessary under certain
circumstances.

I must be trying the wrong ones then. I tried the Garmin Varia UT800 from a friend of mine. Because it has a GoPro interface it would be a promising option. After using it for an hour in freezing temperatures the light output was pathetic so I will stay with my dynohub solution and don't have to worry about the batteries run out of power or forgetting to charge them. YMMV.

The reviews of that light are not great. They don't specify the battery,
but I'd guess from the shape that it's a single 18650 cell. Without
knowing the specs, I'd guess that based on the price that they're not
using the highest capacity 18650 cells available, likely a 2600-3000mAH
cell.

This would be my choice for a sub-$100 all-in-one rechargeable Li-Ion
light: https://www.ebay.com/p/26025385144. First saw these at the
manufacturer's booth at Interbike in 2018 and bought the demo unit on
the last day of the show (the older 1600 lumen model). Besides the high
capacity battery, I like that the DRL operates in "breath mode" rather
than "flash mode."

Barry Beam's Oculus was also very good but a little more expensive.
That's the light that Frank bought, apparently when he finally realized
that he needed a higher-power light than what his dynamo light could
provide. Not sure if Oculus is still around. When I try to go to his
site https://www.barrybeams.com I get a "Certificate Error, This Site
is Not Secure." If I just use http://www.barrybeams.com I can get to
the site but under "Buy Now" it shows only two items, and they are both
for 2018 RAAM participants.