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seanp2k
2010.12.02, 05:01 AM
I've been lurking here for quite some time and have bought an item or two from the marketplace but haven't really posted much.

I think out of all the places I'm putting this, here will be the most relevant as battery performance is vital to winning races.

I have other hobbies besides Mini-Z; higher-end personal audio (Head-Fi), home stereo, car audio, stupidly bright flashlights (Candle Power Forums), and Laptops (and computers in general). Among these seemingly unrelated hobbies, they all share the same driving force: Batteries.

Batteries have some huge hype surrounding certain products on the internet, and generally ads and reviews aim to confuse the average consumer and sell them re-badged low-quality cells for a high mark-up.



Well,

I would like to do something about this. But I need your help.



I am employed by a medium-sized web hosting company, and I've been doing things on the web and with computers for some time, so I decided to purchase a domain name and set up a comprehensive battery wiki that anyone can contribute to,

http://batterydb.com



Since I can't really purchase many different cells and use them just to test them, I'd really appreciate if those of you with the knowledge / equipment could create pages for your particular cells. The guidelines are posted over on the site, but here is what I have so far (constructive / snarky criticism welcome):


Contribute

*
This is an open wiki, which means you can create a page even if you're not logged in. However, you will have to complete a captcha. To actually link to your article from a page here, you'll need to create a user account, or wait for your article to be linked up by me.

Creating an article

*
To create an article, type the namespace and the name of the article in the search box, then when it says “that page doesn't exist”, hold your mouse over the “gear” icon just to the left of the search box, and select “Create this page” from the menu.

Naming Convention

*
Please keep the articles in the following format: manufacturer_model-name
o
Example of a good name: sanyo_hr4u-2-1000-mbo

What to put in your article

*
At this point in time, as much information as you have. I'll try to standardize this at some point, but for the first few articles, I'd just like to get as much information as possible and “see what works”, and we'll go from there.
*
In general, try to include the following:
o
Advertised capacity in MaH
o
Exact model number
o
Date purchased
o
Date data was obtained
o
Approximate recharge cycles the cell has been through
o
Condition of cell (new, slightly used, used daily, damaged, etc)
o
Time since last charge
o
Details of charge (what MaH or C [C= times capacity of the cell]), duration, special charger mode ,if applicable)
o
Equipment used (test equipment and charging equipment)
o
Details of drain (what device, power draw (voltage and MaH), run time)
o
Calculated or measured capacity (a graph would be nice, if you have the data for it)
o
Calculated watt-hours
o
Starting voltage of cell, cell voltage under load, cell voltage when load removed, and cell depleted
o
Price per cell
o
Weight of cell
o
Exact measurements of cell (Measured with accurate calipers, these are now affordable)
o
Your thoughts on the product (the only place for subjective information) Do you feel that the cell is a good value, did it explode in your face, etc.

Testing Equipment

*
I own the following relevant equipment:
o
PowerEx Maha Wizard One C9000 charger (I will use this for all my analysis)
o
About 12 sets of NiMH batteries in various versions and sizes
o
Fluke 15B digital multimeter
o
Many devices that drain batteries (powerful flashlights, Mini-Z R/C cars, headphone amplifiers etc)



Thanks for your help. I'll be posting this on Head-Fi and Candle Power Forums in the hopes that this idea will be well-received in those contexts as well.

ChiMiniRc
2010.12.02, 11:40 AM
Excellent Idea. I may need your help with the first few posts. But I have hundreds of AAA I've aquired for the club. I cycle them all on the Maha and so many different results. The only thing I wish I had to test was something that would measure voltage under 1amp discharge. Plot a curve.

All the cells are matched and labeled. I bought a case of green 1000mah batteries for amain that range from 500mah-850mah on a 500mah discharge.
In the course of building the club I've gotten tons of brands in various conditions. I can post my results but I don't know how old or how cycled they are. A database like this can tell me just how healty they may still be.

Example, I have some duracell 900mah that still get 700-800mah discharge. I would say that is still quite good.

I also have some team Orion 1100mah that can't get past 700 on any cells. A database like this would help me know if these are heavily used or just team orion doing capactiy inflation.


Is there a mechanism for submitting photos. I know on candlepower they focus a lot on the tips of the batteries at it seems to help narrow down the true manufacturer.

ChiMiniRc
2010.12.02, 11:44 AM
Right off the start, can we change MFG to Brand? I see in the future a need to specify the label vs the potential MFG.

I know with the Amain batteries I got (which I'd label as generic, purchased from amain hobbies), some have vents at the tip, some don't. Some have white cardboard, others black. THe higher capacity ones tend to share the same visual characteristics.

rensuchan
2010.12.02, 12:21 PM
I also have some team Orion 1100mah that can't get past 700 on any cells. A database like this would help me know if these are heavily used or just team orion doing capactiy inflation.


My Orion 1100s are in the upper 700's... around 775 average on a pack of 4, used for a few months.

I leave near seanp2k and we race at the same club so I'll probably be lending him some of my sets / contributing with my own analysis.

seanp2k
2010.12.02, 11:18 PM
Awesome, I have some brand new Sanyo 1000MaH cells that are going through break-in on my C9000 right now. I'll make the first post and clean things up a bit so we can get a good flow / standard set of data started. The eventuality of this would be a search-able DB with all the different stats side-by-side, like http://somaseek.com (another site I made).

Throaw
2013.01.08, 04:01 AM
I've been lurking here for quite some time and have bought an item or two from the marketplace but haven't really posted much.

I think out of all the places I'm putting this, here will be the most relevant as battery performance is vital to winning races.

I have other hobbies besides Mini-Z; higher-end personal audio (Head-Fi), home stereo, car audio, stupidly bright flashlights (Candle Power Forums), and Laptops (and computers in general). Among these seemingly unrelated hobbies, they all share the same driving force: Batteries.

Batteries have some huge hype surrounding certain products car dvd players (http://www.robustbuy.com/car-accessories-car-indash-dvd-players-c-492_974.html) on the internet, and generally ads and reviews aim to confuse the average consumer and sell them re-badged low-quality cells for a high mark-up.



Well,

I would like to do something about this. But I need your help.



I am employed by a medium-sized web hosting company, and I've been doing things on the web and with computers for some time, so I decided to purchase a domain name and set up a comprehensive battery wiki that anyone can contribute to,




Since I can't really purchase many different cells and use them just to test them, I'd really appreciate if those of you with the knowledge / equipment could create pages for your particular cells. The guidelines are posted over on the site, but here is what I have so far (constructive / snarky criticism welcome):


Contribute

*
This is an open wiki, which means you can create a page even if you're not logged in. However, you will have to complete a captcha. To actually link to your article from a page here, you'll need to create a user account, or wait for your article to be linked up by me.

Creating an article

*
To create an article, type the namespace and the name of the article in the search box, then when it says “that page doesn't exist”, hold your mouse over the “gear” icon just to the left of the search box, and select “Create this page” from the menu.

Naming Convention

*
Please keep the articles in the following format: manufacturer_model-name
o
Example of a good name: sanyo_hr4u-2-1000-mbo

What to put in your article

*
At this point in time, as much information as you have. I'll try to standardize this at some point, but for the first few articles, I'd just like to get as much information as possible and “see what works”, and we'll go from there.
*
In general, try to include the following:
o
Advertised capacity in MaH
o
Exact model number
o
Date purchased
o
Date data was obtained
o
Approximate recharge cycles the cell has been through
o
Condition of cell (new, slightly used, used daily, damaged, etc)
o
Time since last charge
o
Details of charge (what MaH or C [C= times capacity of the cell]), duration, special charger mode ,if applicable)
o
Equipment used (test equipment and charging equipment)
o
Details of drain (what device, power draw (voltage and MaH), run time)
o
Calculated or measured capacity (a graph would be nice, if you have the data for it)
o
Calculated watt-hours
o
Starting voltage of cell, cell voltage under load, cell voltage when load removed, and cell depleted
o
Price per cell
o
Weight of cell
o
Exact measurements of cell (Measured with accurate calipers, these are now affordable)
o
Your thoughts on the product (the only place for subjective information) Do you feel that the cell is a good value, did it explode in your face, etc.

Testing Equipment

*
I own the following relevant equipment:
o
PowerEx Maha Wizard One C9000 charger (I will use this for all my analysis)
o
About 12 sets of NiMH batteries in various versions and sizes
o
Fluke 15B digital multimeter
o
Many devices that drain batteries (powerful flashlights, Mini-Z R/C cars, headphone amplifiers etc)



Thanks for your help. I'll be posting this on Head-Fi and Candle Power Forums in the hopes that this idea will be well-received in those contexts as well.

I would like to see your audio system. Can you post some pics. It will great.