Type here your search

Celebrating our

  • 30th. anniversary

Clearance Big Sale

Our Manufacturers (BRANDS)

  • Links in this color are Brands being discontinued

Model Railroad Main Brands

Our Products

Figures, Structures & Buildings

Accessories, Scenery, Signals

Electronics, Catenary, eMotion

HO Vehicles, Buses, Cranes

Radio Control Main Brands

Drones and quadcopters

Plastic Model Kits

Paint, accessories for painting

Wooden models ships & kits

Slot Cars

Die Cast Products

Rockets and accessories

Last update 02.15.19 1:44 PM



To Micro Macro Mundo

Read News & subscribe

2015 new Items

2014 new Items

Site map

The New Store


Conditions of Sale

Privacy Policy.

Postal Rates

To reach us

Repair rates

Layout pictures

Super DC-8 destroyed

Store in airplane crash

Credit Card Fraud


Click on logos to get Brand pages.

Find us on Facebook

Marklin trains, HO Z and 1 gauge

Trix Trains in HO scale, made by Marklin in DC 2 rail

Minitrix Trains in N scale Trix minitrix

Roco European Model Trains in HO scale, the best in AC and DC plus DCC available

Bachmann model trains, starter sets, locomotives and rolling stock all can be found here

Kato model trains in HO and N scales for the American style modeler


Whalters main line, Proto-2000, Cornerstone and many more here

Vollmer model structures and buildings in HO and N gauge as well as Z gauge for Marklin Trains

Faller model buildings and estructures in HO N and Z gauge. For dioramas and layouts.

Kibri Manufacturer of buildings and structures, cars, cranes, moving vehicles and many other stuff

POLA a subsidiary of Faller GmbH manufactures G scale structures

Preiser figures and models finely hand painted in scales from 1.22 to 1.220

Viessmann catenary, lighting and signals and accessories are just the best and cheapest. 100% Marklin compatible. Digital for DCC and Motorola

When wood models is the issue, nobody makes better kits than Artesania Latina. You must try these and enjoy the results

Revell from Germany and also Monogram-Revell, the most populat Brand in teh World

Hasegawa models of first class quality, large selection of airplanes

Italery Italian manufacturer of plastic models exclusive models and OEM for Tamiya

trumpeter large scale models of warships including scales up to 1:200

Bandai Gundam Model kits

Tamiya complete line of products in plastic, radio control and accessories and paints.

Check our our blog where some news are published as soon as they become available

Find us in our pages on Facebook

Latest news:

You can now navigate by Brands or by Categories at your will, with a powerful search engine that will take you to the minimum detail you might need.

We are constantly improving the information we have on each item, with pictures and movies available, so take a tour at our new shopping cart and enjoy the World of information and lower prices you can't find anywhere else in the Internet.

rocousa.com is the largest web site in the Industry by far.

A referral for Micro Macro Mundo Inc.

7564 S.W. 117th. Ave.
Miami Florida 33183
PH: 305-279-8033
FX: 305-279-0195

Store Hours:

Monday to Friday:
Nov 06 to Mar 12
10 am to 6 PM

Mar 13 to Nov 07
11 am to 7 PM (DST)

10 am to 3 PM all year long
Sunday Closed

Over 62 million hits and counting.

Like us on Facebook



Home » » All Products
Traxxas 2840 LiPo 2S 7.4V 3300mAh 25C Battery.
Traxxas 2840 LiPo 2S 74V 3300mAh 25C
Product ID TRA2840
Manufacturer Traxxas
ISBN 0020334284006
Traxxas 2840 LiPo 2S 74V 3300mAh 25C
  • Introduction
  • AMA LiPo Safety Alert
  • Reviews
This is the Traxxas 2840 LiPo 2S 7.4V 3300mAh 25C Battery.      
 FEATURES: Semi rigid construction does not require a hard case and eliminates 
             wire harness connectors that can loosen and fail                  
           Engineered specifically to fit Traxxas models                       
           12AWG multi strand wire is soldered directly to the LiPo cells      
             eliminating increased resistance from bullet connectors and       
             accidental reversed polarity connections                          
 INCLUDES: Traxxas Power Cell 7.4V 3300mAh 25C LiPo 2S Battery with High       
             Current Connector and JST/XH Balance Plug                         
 REQUIRES: Balancer and LiPo compatible charger or LiPo charger with built-in  
             balancer such as the Onyx 235, DTXP4235                           
           LiPo charging bag                                                   
 SPECS:    Configuration: 2S2P                                                 
           Continuous Discharge: 25C (83A)                                     
           Max Burst Rate: 50C (165A)                                          
           Watt Hours: 24.42                                                   
           Charge Rate: 1C (3.3A)                                              
           Max Charge Rate: 2C (6.6A)                                          
           Dimensions: 5.3 x 0.8 x 1.8" (135 x 21 x 45mm)                      
           Weight: 6.3oz (178g)                                                
 COMMENTS: ALWAYS use a LiPo-approved Charger                                  
           ALWAYS use a LiPo Cell Balancer                                     
           NEVER Charge over 4.20V per cell                                    
           NEVER Charge at currents greater than 1C                            
           NEVER Charge through the "To ESC or "DISCHARGE" lead                
           NEVER Trickle Charge                                                
           NEVER allow to Discharge below 2.5V per cell                        
           NEVER disassemble or modify pack wiring in any way or puncture cells
           NEVER place on combustible materials or leave unattended during     
           ALWAYS Charge in a fireproof location                               
           ALWAYS set charger's output volts to match battery volts            
           ALWAYS keep out of reach of children                                
                                                                    jxs 09/15/11
 BOX DIMENSIONS:    2.50" W. X   1.50" H. X   7.13" L.
 BOX WEIGHT:     .48 LBS.
  1. ALWAYS use a LiPo-approved Charger
  2. ALWAYS use a LiPo Cell Balancer
  3. NEVER Charge over 4.20V per cell
  4. NEVER Charge at currents greater than 1C
  5. NEVER Charge through the "To ESC or "DISCHARGE" lead
  6. NEVER Trickle Charge
  7. NEVER allow to Discharge below 2.5V per cell
  8. NEVER disassemble or modify pack wiring in any way or puncture cells
  9. NEVER place on combustible materials or leave unattended during charging
  10. ALWAYS Charge in a fireproof location
  11. ALWAYS set charger's output volts to match battery volts
  12. ALWAYS keep out of reach of children

Lithium Battery Fires
Lithium batteries are becoming very popular for powering the control and power systems in our models. This is true because of their very high energy density (amp-hrs/wt. ratio) compared to NiCd’s or other batteries. With high energy comes increased risk in their use. The principal risk is FIRE which can result from improper charging, crash damage, or shorting the batteries. All vendors of these batteries warn their customers of this danger and recommend extreme caution in their use. In spite of this, many fires have occurred as a result of the use of Lithium Polymer batteries resulting in loss of models, automobiles, and other property. Homes and garages and workshops have also burned. A lithium battery fire is very hot (several thousand degrees) and is an excellent initiator for ancillary (resulting) fires. Fire occurs due to contact between Lithium and oxygen in the air. It does not need any other source of ignition, or fuel to start, and burns almost explosively. These batteries must be used in a manner that precludes ancillary fire. The following is recommended:
  1. Store, and charge, in a fireproof container; never in your model.
  2. Charge in a protected area devoid of combustibles. Always stand watch over the charging process. Never leave the charging process unattended.
  3. In the event of damage from crashes, etc, carefully remove to a safe place for at least a half hour to observe. Physically damaged cells could erupt into flame and after sufficient time to ensure safety, should be discarded in accordance with the instructions which came with the batteries. Never attempt to charge a cell with physical damage, regardless of how slight.
  4. Always use chargers designed for the specific purpose, preferably having a fixed setting for your particular pack. Many fires occur in using selectable/adjustable chargers improperly set. Never attempt to charge Lithium cells with a charger which is not specifically designed for charging Lithium cells. Never use chargers designed for Nickel Cadmium batteries.
  5. Use charging systems that monitor and control the charge state of each cell in the pack. Unbalanced cells can lead to disaster if it permits overcharge of a single cell in the pack. If the batteries show any sign of swelling, discontinue charging and remove them to a safe place outside as they could erupt into flames.
  6. Most important: NEVER PLUG IN A BATTERY AND LEAVE IT TO CHARGE UNATTENDED OVERNIGHT. Serious fires have resulted from this practice.
  7. Do not attempt to make your own battery packs from individual cells.
These batteries CANNOT be handled and charged casually such as has been the practice for years with other types of batteries. The consequence of this practice can be very serious resulting in major property damage and/or personal harm.

Safety Committee
Academy of Model Aeronautics
5161 E Memorial Drive
Muncie, IN 47302

Please continue checking back, pricing and availability are subject to change. Additional information will be amended when it becomes available. Thank you.
Por favor, continue revise de nuevo. Precios y disponibilidad estan sujetos a cambios. Informacion adicional se modificara cuando este disponible. Gracias.
Product Reviews (Please login to leave a review)

No Reviews For This Product.

Price: $45.93
We have 0


We accept now




with questions or comments about this web site

A referral for Micro Macro Mundo Inc.
(The European Model Trains Headquarters)
7564 S.W. 117th. Ave.
Miami Florida 33183
PH: 305-279-8033
FX: 305-279-0195

© 1994-2019 Rocousa.com.
(The European Model Trains Headquarters) or its affiliates.