EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)

This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
Low Price: $36.99
Discontinued Online

This is the Ecopower "Electron" 2S 5000mAh, 30C Lithium Polymer hard case battery pack. Every hobby enthusiast is unique, each with their own specific needs and expectations. Not everyone needs a professional grade, high performance LiPo battery, while others simply don’t want to spend big bucks on the latest “flavor of the month”. The common thread between these customers is they both want a reliable and affordable battery that provides good runtime, good power and reliable performance, and AMain Sports & Hobbies is ready to deliver with EcoPower!

EcoPower batteries are tested in house, allowing us to provide batteries that deliver accurate specifications and reliable power, at a price that is geared towards our value conscious customers. Plus, if we say it’s in stock, you know we have it. And when you buy it, we will back it up with the outstanding customer service and support that you have come to expect from AMain Sports & Hobbies. So stop beating yourself with cheap batteries, and buy from a trusted source that proves itself time after time with quality products at affordable prices! 

This pack includes includes an integrated balance charge lead with a Deans style T-plug installed for a convenient connection capable of handling extremely high amp rates. While the 3-pin Align/E-Flite style XH balance connector provides compatibility with one of the most common varieties of balance tap connection.This battery can be used in any application where you would use a 6-cell NiMH stick or race pack, and are significantly lighter when compared to regular NiMH packs. This makes the overall vehicle weight lighter for significantly improved acceleration. These batteries also have a nominal voltage of 7.4V compared to the 7.2V of regular NiMH batteries, and have dramatically reduced internal resistance. This leads to increased top speed and improved 'punch' off the line. 


  • When used with Traxxas 2S applications, you must use the optional extended battery strap.
  •  When used with Traxxas 2S applications, you must install an adapter for the Traxxas High Current Connector (PTK-5228).
  • Some vehicles may require some re-balancing if the light weight of these batteries cause some handling changes. To get the vehicle to balance correctly, add some weight to the battery side of the vehicle.


  • ROAR Approved!
  • Type: Lithium Polymer
  • Capacity: 5000 mAh
  • Voltage: 7.4V nominal
  • Connector Type: Ultra T-Style
  • Balancer Type: Align/E-Flite compatible (XH)
  • Number of Cells: 2
  • Weight: 306g
  • Dimensions (WxLxH): 46 x 138.5 x 25mm
  • Maximum Charge Rate: 2C (10A)
  • Maximum Continuous Discharge: 30C (150A)

1) DO NOT leave the battery in your model when charging
2) DO NOT leave unattended when charging
3) ALWAYS balance charge the battery
4) ALWAYS use a LiPo charging bag
5) YOU MUST use a Li-Poly specific charger to charge the pack (NiMH or NiCD only chargers WILL NOT WORK!)
6) YOU MUST not over discharge the Li-Poly battery pack
7) READ & UNDERSTAND the instructions carefully before operating this battery

NOTE: When using high energy Li-Polymer Batteries, please do not over-discharge or over-charge batteries as this will result in over heated batteries. Discharging capacity can't exceed 80% of the max capacity of the pack after full charging to ensure a good cycle performance. It is recommended to fully charge a brand new battery before using and only discharge the battery 50% for first 5 cycles. Always monitor race time and/or set a low voltage warning on ESC (End voltage cannot be lower than 3.2v per cell). Do not use the battery that has too low a voltage.

Do not expose batteries to sunshine or store/charge batteries at the temperature above 35°C or in a closed car. The high temperature environment could cause damage to the pack or make it burst. If the battery becomes hot while fast charging, high current discharging or racing, do not charge the battery until it has cooled completely. Wait about 20 mins, then inspect prior to recharging.

EcoPower is an AMain Sports & Hobbies brand

This product was added to our catalog on December 16, 2011

Kaleb Hamby
Verified Owner
Sunday, Jul 28 2013 (about 5 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I will start by saying that these batteries are great for the price. I have 4 or 5 five of these batteries. I bought a few the day after Thanksgiving last year for $20. I use them in my race trucks because I couldn't see paying a $100 bucks for one. They have worked well and seem to have good power and reserve but I have noticed they are starting to loose some of their juice. I probably have over 50 cycles over the ones I use the most (I marked them when new) and it just seemed that at the last race I was missing some speed about 2 minutes into the race. For someone just starting to race or getting into the hobby, I feel that these are the best batteries that money can buy.

NEW info

I have since purchased some of the Protek 100C batteries and there is definitely a difference in performance. I still recommend though for someone getting into the sport or hobby to buy the Ecopower batteries first. Until you understand the whole concept of charging and discharging LIPO batteries properly I would not buy expensive batteries just in case you damage a battery. Plus I wouldn't have been able to tell the difference between the Ecopower and Protek batteries when I first started racing because I could not consistently hold the truck straight and get on the throttle hard.
nicolas wightgarfield
Verified Owner
Tuesday, Mar 4 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I have four of theses and all of them have been used atleast 20 times or more and I haven't had any problems ive been using them in my stock buggy and sct and I haven't had any disadvantage on the track I am beating guys with better batteries every weekend. you cant go wrong with theses batteries.
Joe Eichmann
Verified Owner
Sunday, Oct 14 2012 (about 6 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
Very nice battery for the price, also very good support & shipping!!
Chris Riddington
Verified Owner
Saturday, Jan 5 2013 (about 5 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
Good packs for my son, great price good for a beginner lipo.
Vickie Turner
Verified Owner
Saturday, Jul 14 2012 (about 6 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
hi this is josh and i have had this battery almost a month and it is one of the best batteries i can think of for the price. i got the ecopower electron 65ac charger and this battery for $85.00 and it was my best decision for my birth day i wish i just had got a stampede or something instead of the savage xs because it has only 10-15 runs and i probably have 40.00 in spare parts not including what hpi sent me. this is a very good battery it lasts about 30-45 mins with half to full throtle and it has plenty of punch this would probably would not be the best battery for a power 8th scale brushless because of the c rating but for a savage xs or a trail truck it would be a good combo for one of those. i would recomend you get this 100%. also if your esc doesn't have deans than you need to solder a connector on this that goes with your esc. if you get this battery or any lipo make sure you have a lipo safe bag to prevent damage if a lipo fire may occur. thanks for reading, Josh
Tom Ancona
Verified Owner
Friday, Jan 13 2012 (about 6 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
this is a nice lipo pack for the money. they fit grate in my truck and the power is awsome.
JOhn G.
Verified Owner
Wednesday, Mar 26 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
This battery works great. I have it in my 2wd slash and it works well with the xl5 esc. After i upgraded to my castle system i wish the run time was a little longer but can't complain. Overall good.
frank braswell
Verified Owner
Wednesday, Mar 5 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I bought three of these packs and they produce awesome power and run time, great bang for the buck. save your money and buy a hotter motor, these packs have served me well. will purchase more. wish these were available in shorty and saddle.
Daniel Thompson
Verified Owner
Tuesday, Jan 31 2012 (about 6 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
This is an awesome pack, You can't go wrong for the price, This is the perfect compliment to the RTR Short Course trucks :)
John Thomas
Verified Owner
Thursday, Jan 19 2012 (about 6 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
Gotta love Amain's shipping, came really quick :). The pack is pretty good. The case is nice and made of some good plastic. I have only ran it once thus far and it gets good runs. It is actually the only pack I have ever gotten that has charged to the actiually mah ratings which is good in my book! Will probably get another one while the 'shipping' is free and can get it for 35 :)!!!
James Pettet
Verified Owner
Saturday, Jan 14 2017 (about a year ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
Great battery. I run these in my scx10 and my emaxx.. Never had any issues with them holding a charge or any issues with the cells. i do recommend these batteries for the price
Sup3r Midg3t
Verified Owner
Tuesday, May 6 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
First look at battery. I bought mine about a month ago. 20 or so charges just started to notice that it's maxing out a 8.37V instead of the 8.40V. Maybe I charged it too soon after running. Maybe it's just the battery! but for a 5000mah lipo verses a 1800mah nimh on my ECX Ruckus? That's 2.8x the run time! Charges good at 5A (also charges faster than the stock nimh & charger). Stays pretty well balanced while charging. For backyard bashing, this battery is working out so far! I just need to upgrade to a brushless system next ;)

Now. My battery lasted me exactly two years before it started swelling. It didn't hold full voltage after a charge for half the time probably. But it didn't seem to care. It seen hundreds of cycles during the time it was alive. So for the amount of yard bashing I did, it withstood for quite a while. I used the ecopower charger as well.
kenny worley
Verified Owner
Tuesday, Feb 9 2016 (about 2 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I have had a charger that is compatible with Lipo battery's for a long time, but I wasn't going to transition to lipos due to how expensive they can be. Now in all honesty I am not a lipo wiz. But I have had these battery's for almost a year now and have been extremely happy with them. They still charge to capacity and balance well. Thank you Amain for giving us a cheap alternative lipo!
mark stout
Verified Owner
Saturday, Oct 10 2015 (about 3 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I purchased two of them and for the price they are great! I have about 7 cycles in each and no sign of any problems.
armando sanchez
Verified Owner
Friday, Jul 31 2015 (about 3 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I bought 2 of these and so far very good. I use them for practice and for bashing with my kids. I was going to use them for racing but decided to get a better battery, not because these don`t work but because i just wanted something a little better. I have used these for about 3 months and they still seem work great. For the price you can`t go wrong. i will get some more of these when they go on sale again.
Verified Owner
Wednesday, Jul 22 2015 (about 3 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I bought one of these batteries to try, and it is awesome, just like the other reviews have stated. After the first charge my TC picked up 1-2 mph of straight-line speed, according to the radar gun. This battery's smaller size is also a big advantage when space is limited. Where else can you find a ROAR approved, hard cased LiPo battery for $35 bucks? I am definitely getting some more of these! I only wish that they would have the option of being sold with a Traxxas plug; but, it gives me an excuse to break out the soldering iron! Great LiPo at a great price, period.
phillip miemietz
Verified Owner
Sunday, Jan 25 2015 (about 3 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I got this battery in July 2014 and it runs great I get about 30-40 mins of run time on one full balance charge. running in a 2w slash with castle motor and esc and I couldn't be any happier with it going to buy another one soon I belive its the best bang for your buck and with a a good balance charger u will be set
Matt V
Verified Owner
Tuesday, Dec 30 2014 (about 3 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
This is a phenomenal battery at any price, but for this its a steal! I just wanted a cheap 2S LiPo but that is not what I got with this battery. The cells are perfectly matched, arrived at 47%, and I feel like I probably didn't even need to break it in. I am running a castle 3800kv motor in a stampede 4x4 and it kills batteries but this one has more than risen to the occasion. Buy two, you won't find a better 2S for the money you would pay for two of these.
John Robinson
Verified Owner
Tuesday, Jul 8 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I like these batteries i have 65 charges on them and they still charge full charge.They are great for the price.
Verified Owner
Tuesday, Jun 17 2014 (about 4 years ago)
EcoPower "Electron" 2S 30C Hard Case LiPo Battery (7.4V/5000mAh) (ROAR Approved)
I picked up 3 of these for my SC10B for racing. After two race days and several charges on each I have to say these are good batteries for the price. I ran for over 20 minutes in practice and only charged it by 3900 mah. It would only use 1600 mah in the heat races and closer to 2200 in the mains. I will buy more of these. These would be a great bashing battery also.