Save money and help the environment - choose accumulators!
As your RC-Train will certainly be used frequently, rechargeable batteries (accumulators) are the most economic and environmentally friendly way to power it. Accumulators are not that expensive - one accumulator does not cost much more than four ordinary batteries. But whereas a battery can only be recycled after usage, you can recharge accumulators over and over again!
Which accumulators? The stronger, the better!
The stronger your accumulators are, the longer your RC-Train will run on them. The strength of a battery is measured Milliampere Hours (mAh). Batteries with less than 1200 mAh are not strong enough for your RC-Train, batteries with 1600 mAh are not much more expensive but last longer. Hint: New accumulators might not deliver their full power until they have been used (charged and unloaded) two or three times.
Which batteries? Avoid zinc-carbon!
Not all batteries are strong enough to do the job. Zinc carbon batteries are not powerful enough for your RC-Train whereas alkaline or lithium batteries work much better.
Every chain is only as strong as its weakest link!
No matter whether you decide to use batteries or accumulators you should not use batteries with different strengths or charge states together at the same time. In this type of situation, the performance of the strong or fully charged batteries will be reduced to the level of the weaker or less charged batteries. One old empty battery is enough to keep all other batteries from delivering their full power - in fact you wouldn't get any more power than you would using all old batteries.
Your RC-Train is always ready for action so it consumes power when it is not in motion, too. To prevent the batteries from engaging and losing power simply remove the battery compartment of the RC-Train. You can see at a single glance whether this has been done - the Train’s lights don’t shine while the battery case is removed.