Riva 901 questions

[JTman]

Ok so I've been wanting to get a KR8 battery to vape my KR8 cartos at a true 3.7 volts. If I recall correctly a 901 (such as Electronic Cigarette - Starter Kits - Riva 901) uses the same connection as a KR8. If so, that leads me to ask: Is the riva 901 a true 3.7 volt device? or does it only put out around 3.2v like the 510 eGo? As always thanks for the help ECF

 

[mistinthewoods]

Read this post earlier. I'm currently charging one of my 901 Riva batteries (don't use them much any more) and I'll take a reading when it's charged and let you know. I think I remember testing a 510 Riva once and it read 4.2V fresh off the charger but I've gotten a new multimeter since then.

 

[spider362]

You might want to take your voltage readings while the battery is under load with an atty/carto/or an appropriately size resistor attached. Voltages will sag (drop) under load. The amount of sag will depend on the capacity of the battery; the higher the capacity the less the sag.

For example:
A 4.2 volt fully charged battery may only produce 3.2 - 3.7 volts with an atty attached.

 

[JTman]

Liberty-flight.com lists the working voltage as 3.3-4.2 but they also list that same range for the eGo batts. I know there are a few members here that are quite adament that eGo bats only put out like 3.2 at max. I appreciate the effort Mist! I look forward to what you find.

I have one other thought. Could I use my 510 to KR808 adapter to charge a KR808 battery? just a thought. If i could do that I could just buy a battery cheap somewhere. But with the riva 901 kit only being 30 bucks at LF id rather have the fat batts if they put out the same volts as a KR8.

 

[JTman]

You might want to take your voltage readings while the battery is under load with an atty/carto/or an appropriately size resistor attached. Voltages will sag (drop) under load. The amount of sag will depend on the capacity of the battery; the higher the capacity the less the sag.

For example:
A 4.2 volt fully charged battery may only produce 3.2 - 3.7 volts with an atty attached.

yes! Under load was the term I was mentally searching for. that was the big deal with the eGo only being 3.2v under load while KR8's held at 3.7 under load. I wish i would have saved those thread that were discussing the topic... DOH!

 

[spider362]

I have both KR8 and 510 Riva batteries and when using a 901 atty (using a 510 to 901 adapter with the Riva) I can't tell any difference in vapor/flavor production.

Haven't measured the voltages under load, though.

 

[JTman]

I want to try a KR8 with the KR8 cartos I have but its just silly when I can get a 901 riva kit for less than a KR8 kit. I just want to be sure they put out the same power. I find that my KR8 cartos are underwhelming when using them with the adapter on my 510 stuff.

When I saw the discussions about eGos only putting out 3.2 vs the KR8's 3.7 I thought maybe I would get a better performance out of them using an actual KR8 batt. But then again, it could just be the cheap Kanger cartos are just crappy regardless of what battery they are being used on. They arent the V4L premiums, they are just the standard ones. I bought them before I even recieved my first kit (510) and didnt know any better.

 

[mistinthewoods]

You might want to take your voltage readings while the battery is under load with an atty/carto/or an appropriately size resistor attached. Voltages will sag (drop) under load. The amount of sag will depend on the capacity of the battery; the higher the capacity the less the sag.

For example:
A 4.2 volt fully charged battery may only produce 3.2 - 3.7 volts with an atty attached.

Yes, well, under load an 18650 or 14500 will drop too so it's all relative.

 

[Firefly13]

To cut a long story short... a Riva 901 is the same as the 510 version, if you want a true 3.7v hit like a KR8 battery then go look at the PigCig from LeCig.