Which maximizes efficiency which in turn means less chargers & (of course if you are making a custom battery you will need a BMS complicated system & Soldering skills) so you either need 2x 6s Battery chargers or 1x charger that is powerful or large enough to charge 2x 6s batteries at the same time to reduce charging times & this GRAUPNER ULTRAMMAT 18 charger is the charger TRAMPA is currently recommending of using capable of charging 2x 6s cells at any 1 time, so if you are running 12s made up from 2x 6s batteries, using this graupner charger you can charge both 6s cells at the same time. but then you will most likely need an additional balancer cable harness or more chargers to charge/balance each cell individually if you want speedy charging), so for efficiency & simplicity we base our 12s power on the use of 2x 6s cells as generally speaking there are many good priced nice performing chargers put there which also have the ability to balance your cells to prevent failiure of the cell, already on the market are capable of charging up to 2x 6 cells at any 1 time, So as you now know, to achieve 12s power requires a minimum of 2x 6s Batteries (it could be more cells if you were custom making your battery or if you were achieving 12s from 6x 2s, 4x 3s or 3x 4s cells as they can all be harnessed together to make 12s power. Do not push more power than 12s into the VESC6. Using a XT90 Battery harness cable kit to connect 2x 6s batteries together will double the battery power resulting with a 12s Battery WITHOUT Any soldering or Welding!! When 12s power is pumped into the VESC6 you will be able to experience the kind of riding performance everybody is talking about. :-)ġ2s power is the perfect amount of power to be pushed through any of the TRAMPA Electronic products (12s should only be applied when using the very special TRAMPA VESC6 speed controller). The charger comes with a UK or EURO Plug for wall plug in connection, XT90 Jack leads & 2x 7 pin adaptor plates which allow balancer cable connections from 2x batteries from 1s to 6s using JST Connectors. As the Graupner is our suggested charger for the Zippy cells this charger is somehow incorporated into the design of our Battery Boxes so using this charger is nice easy to connect, it is reasonably fast to charge whilst it balances (looking after) your cells at the same time and you dont need to remove anything in order to charge as the cells are all snugly secured away in one of the amazing Carbon fiber boxes, which as it so happens have been designed special for this style of charger & easy charging. The Ultramat 18 charger is used by the TRAMPA team for charging all of our decks that use Zippy Cells for power. The Battlife Guard can be left plugged into the battery even when the discharge process is complete as soon as the battery has reached its storage voltage, the Battlife Guard switches itself off and consumes no further current.This GRAUPNER ULTRAMAT Charger is capable of Charging & Balancing all cells up to 12s in power. The set final discharge voltage ensures that the battery can be stored for a protracted period without suffering damage. The integral LED glows to indicate that the pack is being discharged. The pack to a lower voltage level over a period of several hours.

If the voltage is higher than the voltage threshold which is harmful to the battery, then the unit gently discharges

The Battlife Guard is simply plugged into the battery connector, and the electronic circuit then detects whether the pack's voltage is above a particular level. If lithium batteries are stored for long periods in the fully-charged state, they deteriorate much faster than necessary. This little unit is very simple to use, and can substantially increase the useful life of these packs.

The Battlife Guard has been developed specifically for use with 2S and 3S Li-Ion and LiPo batteries.

Graupner battery guard