Riva SE vs eGo batteries

[pizza2me]

Hi folks,

I'm sure this is on here somewhere, but I can't find it. I heard that Riva SE is real 3.7v, so I got a couple. First, I don't notice much of a difference betweenn the two. May be a little hotter on the Riva SEs. I use LR cartos.

My real question is that I read somewhere (and can't find it now, but would like verification) that the Riva SEs do not stay at 3.7v? Something like it starts at 3.7, but as you use it the voltage goes down... ???

Whereas the eGo's (and maybe non SE Rivas?) stay at a standard voltage until it's dead.

Can some battery experts please help?

Thanks.

 

[roxics]

Honestly I don't know. I've been vaping a Riva SE for the last four months and I never noticed a difference between rotating through it and the standard Riva or eGo batteries I use. The only difference I've noticed is that the band is silver and tends to tarnish more than the recessed eGo band.

 

[JW50]

My experience - tested Riva, 750 mah bat just off charger: 4.2v unloaded and 3.81v loaded at 2.5 ohms. After several hours: 3.74 v unloaded and 3.37 loaded at 2.5 ohms. After cut off but charged for 10 seconds: 3.40v unloaded and 3.05 loaded at 2.5 ohms. Tested Joye eGo, 650 mah bat just off charger: 3.44v unloaded and 3.23 loaded at 2.5 ohms. After an hour or so of vaping: 3.40v unloaded and 3.23v loaded at 2.5 ohms. My opinion - the Riva provides significantly better vaping experience. The drop down to 3.37v on tha Riva is for very short time period. In fact, one can predict that there is only ten minutes or so to cut off when it vapes like a Joye, 650. I usually don't wait to cut-off and start re-charge when it vapes like the Joye. Joye uses PWM and the new Riva do not. More details here: http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html

 

[elkie2331]

I don't know anything about ohms or such like but I bought an eGo about 2 weeks ago and I seem to be getting about 2 days on a charge. Is this normal or am I not vaping as much as I think? In the past 2 weeks I have smoked a few analogs but I was smoking a pack a day and I have not had any analogs in the last 3 days.

 

[JW50]

My experience - tested Riva, 750 mah bat just off charger: 4.2v unloaded and 3.81v loaded at 2.5 ohms. After several hours: 3.74 v unloaded and 3.37 loaded at 2.5 ohms. After cut off but charged for 10 seconds: 3.40v unloaded and 3.05 loaded at 2.5 ohms. Tested Joye eGo, 650 mah bat just off charger: 3.44v unloaded and 3.23 loaded at 2.5 ohms. After an hour or so of vaping: 3.40v unloaded and 3.23v loaded at 2.5 ohms. My opinion - the Riva provides significantly better vaping experience. The drop down to 3.37v on tha Riva is for very short time period. In fact, one can predict that there is only ten minutes or so to cut off when it vapes like a Joye, 650. I usually don't wait to cut-off and start re-charge when it vapes like the Joye. Joye uses PWM and the new Riva do not. More details here: http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html

By my calculations the Riva off the charger was producing almost 40% more watts than the Joye eGo.

 

[JW50]

I don't know anything about ohms or such like but I bought an eGo about 2 weeks ago and I seem to be getting about 2 days on a charge. Is this normal or am I not vaping as much as I think? In the past 2 weeks I have smoked a few analogs but I was smoking a pack a day and I have not had any analogs in the last 3 days.

For me, two days is not right. It suggests you are not vaping that much. Doing an analog in the mix also suggests not vaping enough. I am presuming you are talking about a 650 mah (milli-amp hours) type of eGo. Make that 3 days mentioned 4 and then the 4 days 5. Just to calculate a bit. Presume what I have said of the Riva is correct. Presume that my "hit" was 5 seconds. Then, in that 5 seconds - just off charger - I used 1.89 mah. If really 750 for charge life then I should be able to get about 400 of those hits. Say an analog is 12 hits. So 400 e-cig hits translates to about 33 analogs. Based on your stated 1 pack per day of analogs a 750 mah bat would last you about a day and one half if you continued with e-cigs at same rate as analogs. 650 mah and/or 750 mah full of propaganda (IMO). So - if you make it two days now - drop the analog supplement and get less time from your bat. For me, I get something around 12 hours of vaping out of a 750mah or 650mah bat. But - for me - I think quite acceptable. I have two bats always. If one is pettered out - I'm on the other and peter is recharging.

 

[JW50]

Peter is ready for action in 2 to 3 hours. Great safety factor - IMO.

 

[JW50]

I don't know anything about ohms or such like but I bought an eGo about 2 weeks ago and I seem to be getting about 2 days on a charge. Is this normal or am I not vaping as much as I think? In the past 2 weeks I have smoked a few analogs but I was smoking a pack a day and I have not had any analogs in the last 3 days.

elkie2331 - Ohms are kind of like debt. Like - I own my backer a lot. I own'em a lot. Banker is "resistant" to loan you more. He/she is the "high resistance" type and it takes a whole lot more yelling to get say "watt" out of them. On other hand, if you don't own'em much, they are "low resistance". Less yelling get's the say "what" out of 'em.

 

[Katya]

My experience - tested Riva, 750 mah bat just off charger: 4.2v unloaded and 3.81v loaded at 2.5 ohms. After several hours: 3.74 v unloaded and 3.37 loaded at 2.5 ohms. After cut off but charged for 10 seconds: 3.40v unloaded and 3.05 loaded at 2.5 ohms. Tested Joye eGo, 650 mah bat just off charger: 3.44v unloaded and 3.23 loaded at 2.5 ohms. After an hour or so of vaping: 3.40v unloaded and 3.23v loaded at 2.5 ohms. My opinion - the Riva provides significantly better vaping experience. The drop down to 3.37v on tha Riva is for very short time period. In fact, one can predict that there is only ten minutes or so to cut off when it vapes like a Joye, 650. I usually don't wait to cut-off and start re-charge when it vapes like the Joye. Joye uses PWM and the new Riva do not. More details here: http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html

Thank you so much for the detailed report, JW. That pretty much mirrors Scott's measurements. I didn't know what the cutoff was under load; so you think the cutoff happens at ~3.3v? That's not bad. I thought is would be lower, actually.

I too find that the SE Rivas provide hotter vape. I have atties I can use safely on my eGos but they run too hot on the SE Rivas. You can really tell the difference with LR atties.

 

[JW50]

Trying to comment on Katya comments. Difficulties. This more test than added comments.

 

[JW50]

Dang. Test worked. Two prior did not get posted. Trying again.

In reply/comment to Katya.


Actually I think cut-off about 3v loaded for newer RIVAs. Mine was not an SE but a gold ban "regular". Some confusion in what I wrote. I mention the 3.37v short period for the Riva. That was a unloaded 3.37v which I rounded earlier to 3.40v. But I should have stated the rounded number as 3.4v instead of 3.40v. But the 3v loaded period is a rather short period and most of the use period is in the 3.74 unloaded/3.37 loaded range. The bat inside the Riva hardshell contains the following writings:line one -"13450 2.41Wh", line two - "+ C11010065". Joye is not to be found. The circuit board seems to have the following on it "EGO_02". I say "seems to" as so damned small - really difficult to be certain. Kind of wonder what the "+ C11010065" means. Length of Riva from steel bottom to top of gold ban is about 2.4 inches or about 61mm. Thought perhaps that measurement might be reflected somewhere in the + C number. But apparently not the case. Perhaps it has something to do materials used in bat or maybe a dating code or maybe a manufacturer ID code? Just re-tested a Riva that reached cut-off. Charged 15 seconds and got 3.46v unloaded. 3.4v (unloaded) at cut-off close enough. Interesting though as to how one can get 750 mah out of 2.41 Wh. To get to 750, average voltage would need to be 3.2. Even on loaded basis, Riva seldom below 3.4?

 

[Katya]

Now I'm really confused... I'm interested, of course, in the voltage under load, because that's the voltage that is actually delivered to the atty and is critical in calculating the Wattage. In your previous post you stated that your Riva's loaded voltage was ~3.7v. The SE Rivas that Scottbee tested are indeed the true 3.7v (under load) devices. The eGos regulate somewhere around 3.2-3.4v under load (the newer eGos seem to meter out a bit higher then the older 3.1v ones).

In the words of Scottbee:

Standard "traditional" Riva's use a form of PWM to give them a reduced effective output voltage.. virtually identical to the output voltage of the eGo/Tornado.

These "newer" Riva's and the Riva SE's put out a "true" constant 3.7V (more off of a fresh charge... but it tapers back down to 3.7V rather quickly).

Is it possible that you were testing the old style Riva? Could you clarify this?

BTW, the Rivas are not made by Joyetech, which makes eGos, but by Hello (or possibly another manufacturer used by Eastmall).

I know, it's confusing.

Thanks.

 

[JW50]

Now I'm really confused... I'm interested, of course, in the voltage under load, because that's the voltage that is actually delivered to the atty and is critical in calculating the Wattage. In your previous post you stated that your Riva's loaded voltage was ~3.7v. The SE Rivas that Scottbee tested are indeed the true 3.7v (under load) devices. The eGos regulate somewhere around 3.2-3.4v under load (the newer eGos seem to meter out a bit higher then the older 3.1v ones).

Could you clarify this?

BTW, the Rivas are not made by Joyetech, which makes eGos, but by Hello (or possibly another manufacturer used by Eastmall).

I know, it's confusing.

Thanks.

"Confusing" doesn't do the situation justice. You say "Rivas are made by Joyetech, which makes eGos". Take a look at this: http://www.e-cigarette-forum.com/forum/battery-issues/187381-what-happened-my-my-riva-bat-2.html
Specifically look at the great photos made by the member from Australian, Orph . Photos of a eGo (maybe?) he says. Look at photo 2. Circuit board there says "EGO_02". Josh it must be an eGo! Circuit board there is identical to circuit board that came out of by Riva purchased from L-F relatively recently. That is, my Riva has a circuit board that says "EGO_02". There is no "Joye" written on the battery that I extracted with that circuit board. Scottbee mentions that earlier versions of the Riva had "Joye" on them but later ones not. I must have later one? But board still says "eGo_02". I think the deal must be if Chinese manufactures think we have it figured out - its time to move the shells! Anyway, let me try to clear up my confusion. My Rivas (purchased maybe within past 3 months from L-F) give this - 3.81v under a 2.5 ohm load just off charger, 3.37v under 2.5 ohm load after several hours of use, 3.05 under a 2.5 ohm load just prior to cut-off. By my calculations, watts for three situations 5.81, 4.54 and 3.72. Then Joye eGo (or Tornado eGo, or Tornado eGo-T): 3.23v under 2.5 ohm just off charger and 3.23v under 2.5 ohm load after maybe two hours of use. I calculate 4.17 watts for each of those situations. Didn't take the Joye eGo to cut-off as thought vape on Riva so much better that I used the Riva. I guess when all my Rivas die - then maybe I'll take the Joye eGo to cut-off. For those periods of use where the Riva is less that 3.2 or so volts, vape not great and noticeable. But the less tha 3.2 or so volts is very short period of time until cut-off. Hope that clarifies.

 

[JW50]

Now I'm really confused... I'm interested, of course, in the voltage under load, because that's the voltage that is actually delivered to the atty and is critical in calculating the Wattage. In your previous post you stated that your Riva's loaded voltage was ~3.7v. The SE Rivas that Scottbee tested are indeed the true 3.7v (under load) devices. The eGos regulate somewhere around 3.2-3.4v under load (the newer eGos seem to meter out a bit higher then the older 3.1v ones).

Could you clarify this?

BTW, the Rivas are not made by Joyetech, which makes eGos, but by Hello (or possibly another manufacturer used by Eastmall).

I know, it's confusing.

Thanks.

"Confusing" doesn't do the situation justice. You say "Rivas are made by Joyetech, which makes eGos". Take a look at this: http://www.e-cigarette-forum.com/forum/battery-issues/187381-what-happened-my-my-riva-bat-2.html
Specifically look at the great photos made by the member from Australian, Orph . Photos of a eGo (maybe?) he says. Look at photo 2. Circuit board there says "EGO_02". Josh it must be an eGo! Circuit board there is identical to circuit board that came out of by Riva purchased from L-F relatively recently. That is, my Riva has a circuit board that says "EGO_02". There is no "Joye" written on the battery that I extracted with that circuit board. Scottbee mentions that earlier versions of the Riva had "Joye" on them but later ones not. I must have later one? But board still says "eGo_02". I think the deal must be if Chinese manufactures think we have it figured out - its time to move the shells! Anyway, let me try to clear up my confusion. My Rivas (purchased maybe within past 3 months from L-F) give this - 3.81v under a 2.5 ohm load just off charger, 3.37v under 2.5 ohm load after several hours of use, 3.05 under a 2.5 ohm load just prior to cut-off. By my calculations, watts for three situations 5.81, 4.54 and 3.72. Then Joye eGo (or Tornado eGo, or Tornado eGo-T): 3.23v under 2.5 ohm just off charger and 3.23v under 2.5 ohm load after maybe two hours of use. I calculate 4.17 watts for each of those situations. Didn't take the Joye eGo to cut-off as thought vape on Riva so much better that I used the Riva. I guess when all my Rivas die - then maybe I'll take the Joye eGo to cut-off. For those periods of use where the Riva is less that 3.2 or so volts, vape not great and noticeable. But the less tha 3.2 or so volts is very short period of time until cut-off. Hope that clarifies.

 

[Katya]

Yeah, I'm familiar with that thread... I even contributed...

I know (almost) for a fact that Rivas are made by Hello and (possibly) another manufacturer that works for the Eastmall, but I suspect that they all "borrow" parts from the eGo; why not? China works in mysterious ways... Everything is "copied" freely. I don't think they ever heard of copyrights or trademarks.

Thanks for clarifying the voltage readings for me. Makes sense now. I can't test my batteries under load but there's little doubt in my mind that the SE Rivas run hotter than my eGos.

 

[JW50]

Beyond just noticing the difference of the SE Rivas (I think the gold banded Rivas as well), one could check unloaded voltage just off charger. If non-PWM, one would get about 4.2 volts. If PWM, probably something like 3.4 to 3.49 or so volts.