Foil Drive Batteries & Chargers

Foil Drive Batteries & Chargers – technology, care and safe handling

The batteries are the energy center of every Foil Drive system. They determine how long, how powerful and how reliably assist can be used.

Foil Drive relies on specially tuned lithium polymer batteries (LiPo), developed for high power output combined with compact design.

Basic principle: How does a LiPo battery work?

A LiPo battery (lithium polymer) consists of multiple individual cells that store electrical energy and can deliver very high currents.

Compared to traditional rechargeable batteries, LiPo batteries are:

• more powerful
• lighter
• more sensitive to improper handling

In Foil Drive applications, the focus is not only on capacity but especially on:

• stable voltage under load
• short bursts of high power output
• controlled discharge

Proper handling of LiPo batteries is therefore essential for safety and long service life.

Battery sizes & performance differences

Foil Drive batteries mainly differ in:

• capacity (Wh)
• weight
• maximum power output

As a general rule:

• larger batteries → longer runtime & more reserve
• smaller batteries → lower weight & more agile setup

The right battery depends on:

• system platform (SLIM / MAX / FUSION)
• body weight
• discipline
• usage style (short assist bursts or long assist phases)

Proper charging – normal vs fast charging

Normal charging

• gentle on the cells
• lower heat generation
• recommended for daily use

Fast charging

• significantly shorter charging time
• higher thermal load
• useful when time is limited, but not permanently

Practical recommendation: If you want to maximize battery lifespan, use normal charging most of the time and rely on fast charging only occasionally.

Charging behavior & charge cycles

LiPo batteries are sensitive to:

• deep discharge
• permanent full charge storage

It is recommended to:

• avoid regularly discharging below approx. 20 %
• avoid storing the battery permanently at 100 %

The charger monitors cell balancing, but user behavior remains crucial.

Care after your session

After every session – especially in salt water – the battery should be:

• disconnected from the system
• stored dry
• protected from moisture

Contacts should be clean and free from salt or dirt. Batteries must not be opened, crushed or mechanically stressed.

Storage – short and long term

Short-term storage

• do not store fully charged
• store in a cool and dry place

Long-term storage

• bring battery to approx. 40–60 % charge level
• store cool, dry and protected from light
• check voltage regularly

Properly stored batteries age significantly slower.

Protection & safety

LiPo batteries should be protected from:

• heat
• direct sunlight
• moisture
• mechanical damage

Swollen or damaged batteries must not be used further.

Travel batteries & air travel

Air travel is subject to strict international regulations regarding maximum permitted battery capacity. Foil Drive travel batteries are designed to stay below these limits and can be transported disassembled for flights.

Permitted battery capacities on aircraft

• up to 100 Wh → allowed in carry-on luggage
• 100–160 Wh → allowed with airline approval
• over 160 Wh → not permitted on passenger aircraft

Final approval always lies with the airline.

Differences between Foil Drive batteries & chargers

The following products differ in:

• capacity
• charging speed
• travel and usage profile

The right choice directly affects range, safety and the overall lifespan of your system.

FAQs about Foil Drive Batteries and Chargers