Battery adapter for Rolleiflex SLX, 6006, 6008 (USB-C battery)

• High-current circuit board with gold-plated contacts: cleanly handles brief current spikes so the fuse does not misinterpret them as a continuous load. This also provides reserve for stiff-running cameras, but does not replace maintenance.
• Powerful high-current batteries: Nitecore 14500 with 3A continuous discharge and 7A surge, with no premature cutoff during continuous shooting, unlike the previous Keeppower cells, which shut off at around 2A.
• Double the capacity, half the weight: significantly more shots per charge than with the original NiCd batteries, at around half the weight.
• All three fuses included, plus storage box: 0.8A, 1.0A, and 1.25A (slow-blow glass fuses). Install the one matching your model; the others remain stored.
• Snap-hook replacement: secure fit in the battery compartment, quick replacement without tools.

Safety instructions

Important: The batteries must never be charged in the camera's original charger. Use only the USB-C ports on the cells.

Compatibility

The v2 battery adapter was developed for the Rolleiflex 6000 series. Which fuse belongs in your camera depends on the model; all three fuses are included, and you install the one matching your model yourself according to the table.

Fuse	Compatible cameras
0.8A (medium slow-blow)	Rolleiflex SLX Rolleiflex 6006
1.0A (medium slow-blow)	Rolleiflex 6006 Multi Exposure (also: 6006 model 2) Rolleiflex 6002
1.25A (slow-blow)	Rolleiflex 6001 Rolleiflex 6001 Professional Rolleiflex 6003 Rolleiflex 6003 Professional Rolleiflex 6003 SRC 1000 Rolleiflex 6008 Rolleiflex 6008 Professional Rolleiflex 6008 Professional SRC 1000 Rolleiflex 6008 i Rolleiflex 6008 E

Special case, not tested ourselves:

• Rolleiflex 6008 AF
• Rolleiflex 6008 Integral 2
• Rolleiflex 6001 RCC

These three models use a NiCd voltage-reading circuit in the camera electronics that has historically had detection issues with Li-ion cells. We have not tested the v2 adapter with these models ourselves. It is possible that the new high-current circuit board will solve the problem partially or completely, but we cannot guarantee it. If you own one of these models and would like to try it, please contact us briefly beforehand. We will discuss the prospects of success and offer a goodwill return if it does not work.

Shipping notice (important for international customers)

For regulatory reasons concerning lithium-ion shipping, shipping depends on the included components (regardless of the selected surface, Smooth/Ridged):

• Complete set (with 3x Nitecore batteries + charging distributor): shipping within Germany only.
• \Cage only (with charging distributor, without batteries):\ worldwide shipping. You purchase the three Nitecore NL1411R batteries separately in your country; you’ll find all sources further below under package contents.

Choose a surface: Smooth or Wavy

The adapter is available in two surfaces, technically identical and fully compatible; the difference is purely aesthetic. The visible outer side becomes part of the left side of your Rollei camera body (where the battery sits). Depending on the model generation, this side is smooth or finely ribbed; choose the surface that fits flush with it.

• \Wavy\. The proven version with a fine ribbed texture. It echoes the design of the 6008 family (6008 Professional, Integral, SRC 1000, i, i2, E) and the 6006, and looks most harmonious on these camera bodies.
• \Smooth\, new, flat surface without grooves. Usually the right choice for the SLX, 6001, 6002, and 6003, whose original battery sits flush.

\Not sure?\ Simply send us a photo of the left side of your camera body (where the battery is inserted). We’ll tell you within a minute which surface fits flush. The function and package contents are identical for both versions; the choice is purely aesthetic.

Package contents

“Complete set” variant (with batteries):

• 1× Battery cage v2 with high-current PCB (gold-plated contacts)
• 3× Nitecore 14500 1100mAh Li-ion batteries (USB-C port, status LED, 3A Continuous Discharge)
• 1× USB charging distributor (charges all batteries simultaneously)
• 1× Fuse set in storage box: 0.8A, 1.0A, 1.25A (slow-blow glass fuses, IEC 60127)
• 1× Quick-start guide (DE/EN)

“Cage only” variant (without batteries):

• 1× Battery cage v2 with high-current PCB (gold-plated contacts)
• 1× Fuse set in storage box: 0.8A, 1.0A, 1.25A (slow-blow glass fuses, IEC 60127)
• 1× USB charging distributor (charges all batteries simultaneously)
• 1× Quick-start guide (DE/EN)

The charging distributor is included, but you purchase the batteries separately. We recommend the Nitecore NL1411R (1100mAh, 14500 format, USB-C, 3A Continuous / 7A Surge). You need 3 units. Other 14500 USB-C cells with ≥3A Continuous Discharge also work technically, but have not been tested by us. Any USB-C cable or multi-charger is sufficient for charging.

Where can you get the Nitecore NL1411R?

• Official Nitecore Store (USA, worldwide shipping): nitecorestore.com/products/nitecore-nl1411r
• Battery Junction (Li-ion specialist in the USA): batteryjunction.com/products/nitecore-nl1411r
• Amazon.com (USA): amazon.com Search for “nitecore NL1411R”
• eBay (worldwide shipping): ebay.com Search for “nitecore NL1411R”
• \EU/UK:\ Search your local Nitecore dealer or specialist battery shop for “NL1411R 14500 USB-C"

Technical details

• \Cage material:\ Engineering plastic
• \PCB:\ v2 high-current PCB with gold-plated contacts
• \Battery cells (Complete variant):\ 3× Nitecore NL1411R 14500 Li-ion, 3.6V nominal, 1100mAh, 3A Continuous Discharge, 7A Surge
• Energy per pack: approx. 12 Wh (equivalent to UN3481 Section II)
• Charging port: USB-C directly on each cell, BMS integrated
• Fuses: Set of 0.8A / 1.0A / 1.25A (slow-blow glass fuses, IEC 60127), storage box
• Color: Black

Description

For the Rolleiflex 6008 and its sister models, this adapter replaces the old NiCd battery with three Nitecore 14500 Li-ion cells, which you charge individually via USB-C, providing significantly more shots per charge at around half the weight. Suitable for Rolleiflex SLX, 6001, 6002, 6003, 6006 and 6008; the fuse set for all models in the series is included.

The high-current circuit board with gold-plated contacts also transfers short current spikes cleanly, without the fuse mistaking them for a continuous load. This solves the most common remaining problem with older cameras: when motors with gummed-up mechanisms started up, micro-triggers used to cause the fuse to disconnect prematurely; it still protects against genuine continuous-load faults.

Which 14500 battery? Our comparison

We recommend the Nitecore NL1411R for the adapter, and not on a whim. Before settling on it, we tested several 14500 cells in the cage: Keeppower P1413TC, Keeppower P1450C4, Fenix ARB-L14, Manker 14500 (920 mAh), and various inexpensive no-name cells from Amazon.

Cell	Capacity	USB charging port + protection (BMS)	Continuous current (manufacturer specification)	Max. pulse/surge current (manufacturer specification)
Nitecore NL1411R (our choice)	1100 mAh (3.96 Wh)	USB-C, yes	3 A	7 A, specified
Vapcell K10 INR14500 (customer tip: 6008 series, not tested by us)	1000 mAh (3.7 Wh)	no USB port (charge externally), no, unprotected	8 A	not specified
Keeppower P1413TC	1300 mAh	USB-C, yes	2.0 A	not specified
Keeppower P1450C4	1500 mAh	no USB port (charge externally), yes	no information from the manufacturer	not specified
Fenix ARB-L14-1600U	1600 mAh, but only 1.5 V (regulated)	Micro-USB, yes	none	not specified
Manker 14500 USB-C	920 mAh (3.4 Wh)	USB-C, yes	no information from the manufacturer	not specified
Various no-name brands (Amazon)	highly variable, often overstated	some with USB-C, BMS unclear	usually without a datasheet	not specified

Note on the Fenix ARB-L14-1600U: Internally, this USB variant outputs only 1.5 V (regulated to AA voltage via a DC/DC converter), so it is not suitable for our 3-cell pack with 3.6 V cells (11.1 V combined). With Fenix, make sure you choose a genuine 3.6 V 14500 cell.

The deciding factor is the maximum pulse/surge current. When triggering the shutter, during mirror movement and when the motor starts, the Rollei draws short, powerful current spikes, so the short-term surge current matters—not just the continuous current. The Nitecore NL1411R is the only cell in the test whose manufacturer specifies this value at all: 7 A momentarily. The official Nitecore distributor in Germany (KTL) confirms this to us:

“The NL1411R can briefly deliver a surge current of 7 A, which the Manker presumably cannot. The technical specification for the ‘maximum pulse current’ or ‘overcurrent protection current’ is decisive here, but is actually irrelevant for the average customer. For highly specialized inquiries, the latter specification can be found in the data sheet of most cells. That is why such information is rarely found online.”

A USB charging port means: a protection circuit (BMS) is built in. Every 14500 cell with its own USB charging port includes a small protection circuit (often called a “BMS”). It sits between the cell and the contacts and protects against deep discharge, overcharging, and voltage spikes. That is exactly what you want in 30-year-old camera electronics. Simple 14500 Li-ion cells without a protection circuit also work. They are often cheaper and sometimes deliver higher maximum currents because the current does not have to pass through the small circuit board first. The drawback: no protection against deep discharge or voltage spikes. We recommend protected cells with a USB charging port; unprotected cells are for tinkerers who know exactly what they are doing.

Special case: 6008 series switches off despite the correct fuse. The 6008 models draw the strongest current spikes in the range. Based on our experience with customer feedback, the protection circuit of the Nitecore cells (7 A briefly) is insufficient for most unserviced 6008s: The more heavily the old grease in the camera and lens has hardened, the higher the starting current (with AF lenses, the focus motors add to this). The cell’s protection circuit disconnects, and the camera displays “charge” or switches off during operation. You have two options. Option 1: have the camera serviced (CLA). It will then operate within its factory power consumption again, and the Nitecore cells will be sufficient. Option 2, without servicing: use the Vapcell K10 INR14500 from the outset (1000 mAh, 8 A continuous current, button-top version, charged externally). Several 6008 owners have told us that these cells also supply continuous power to heavily gummed-up cameras; we have not tested them ourselves. Important: This cell is unprotected; it has no protection circuit, so nothing stops deep discharge or current spikes. You must recharge the cells yourself in good time (do not discharge below approx. 3.0 V) and must not continue operating the camera with almost-empty cells; in the worst case, this could damage the camera electronics as well as the cells. Use is therefore expressly at your own risk; the model-appropriate fuse in the cage remains mandatory.

Why this battery is safe

• Three individual batteries, no series charging: Each cell is charged separately via its own USB-C port. This eliminates the main risks of poorly made DIY adapters (overvoltage and fire hazards caused by the lack of balancing).
• BMS in every cell: Protection against overcharging, deep discharge, and overheating, integrated directly into the Nitecore cell.
• Model-specific fuse: The slow-blow glass fuse suitable for your model protects the camera's circuit board from actual defects (short circuits, component failure).
• High-current circuit board v2: Separates surge currents (short, normal load peaks) from continuous loads (actual defects). This keeps the protection in place without causing the fuse to trip falsely during normal operation.

Background

You can find detailed background information on the battery problem of the Rolleiflex 6000 series—myths vs. facts, the true cause of electronic damage, and a comparison of all solution approaches (NiCd, NiMH, Li-Ion)—in our guide article on the Rolleiflex 6000 battery problem.

Compatible with various cameras, including:

Rollei: Rolleiflex 6002, Rolleiflex 6006, Rolleiflex 6008, Rolleiflex SLX [...]

Are you unsure whether the battery fits your camera? Here is a complete list of all cameras compatible with the RFX6000 battery type.

Frequently asked questions

“What should I do if the fuse blows in Continuous mode?”

If your camera blows the fuse in Continuous mode with the correct fuse (see the compatibility table above), this is almost always an indication of hardened grease inside the camera: the focus motor, mirror, and shutter then draw significantly more current than intended at the factory. Recommendation: schedule a service (CLA) with a specialized workshop such as Wiese Fototechnik. The aging capacitors on the camera's circuit board will also be checked during the service. This is the most common actual cause of failure in the 6000 series.

First, check the fuse currently installed. If you previously had a lower rating installed, the wire may have broken long ago. This can look like a power problem, but it is simply a blown fuse. Hold it up to the light: a continuous wire means it is intact.

As a temporary solution at your own risk, you can use the next higher fuse rating (e.g. 1.0A instead of 0.8A for an SLX). This slightly reduces the level of protection; in the event of damage, the fuse will trip later, which in the worst case could affect the camera's circuit board. Acceptable as a temporary measure until your service appointment, but not recommended permanently.