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  1. I

    My EM3EV battery will not turn off? Help! What should I do?

    Question: I just got a new battery from EM3EV, a samsung frame mount battery with 29E cells, 48V, and 11 AH. This is the battery: http://em3ev.com/store/index.php?route=product/product&path=35&product_id=161 After charging it today, the charger automatically cut off, and the battery is at 54.2V...
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    Cyclindrical battery holders: Does this exist comercially?

    I recently built some battery packs for my in progress yuba mundo, to house cylindrical batteries (A123 26650) I was wondering if any similar solution existed commercially. I can only seem to find single or double batter clips and holders, no large packs, none designed for high current, and...
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    Urban Commuter M-Drive Yuba Mundo build

    Well I am just starting this build, but I figured a build log is in order! Sorry, no complete . but I do believe I shall have some photos of the bike in running condition soon! Contents: 1. Design goals and choices: This post 2. Battery packs and chargers 3. Battery cycling 3. The bike and...
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    A123 charge rate-do parallel cells double the a. to charge?

    I am currently still building my battery pack and bike, but I will be using sets of 4 A123 cells in parallel (perhaps more later), then all of those in series with each other to get up to 40v. (Or more!) Now, I would like a bulk charging solution, and if it could be fast charging that would be...
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    So. I cannot figure out my HXT 6mm bullet connectors

    So, I purchased 6mm bullet connectors from hobby king, these things: http://www.hobbyking.com/hobbyking/store/__20353__HXT_6mm_Gold_Connector_w_Protector_10pcs_set_.html Anyway, soldering is easy! What I cannot figure out is how to use the plastic connection protector... I feel stupid, but I...
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    Building modular A123 pack: Questions: Wiring and charging

    WHAT: So: I have determined A123 26650 cells are the safest and best option for me. I have decided to build them into packs of 6, so I can run two packs in series for 39v, or three for about 60v. The series packs will then be hooked up in parallel for range. I have a BASIC BASIC BASIC...
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    A123 - Battery newbie. Some questions.

    So I started a thread on SLA batteries and was quickly turned away from them. Due to needing high safety I have basically decided on A123 batteries. Is this based on old information? I will be charging them in a dorm room, and need them to be SAFE. I am working on setting up a Yuba Mundo build...
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    Looking for info on SLA batteries, couple questions.

    Hello! I am working on setting up a Yuba Mundo build with this kit: http://urbancommuterstore.com/M-Drive-Conversion-Kit-for-Yuba-Mundo-V33-V4-YM-MDRIVEKIT.htm I was thinking I could start out with SLA batteries to save money while I built up the bike. Also I dont really need light weight. I...
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    Newbie- Setting up a new Yuba Mundo build- a bit lost.

    Hello! I am working on planning out an electric Yuba Mundo build, and I have been researching as much as I can, but I have found a lack of information on what I have been looking for. What I want: A yuba with a setup I can still easily use as a pedal bike, but also run as an electric bike with...
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