Preface
The Rollei A 110 and E 110 cameras are designed to use size 110 film1 and a PX27 Mercury battery. It looks like Lomography is the only remaining supplier of size 110 film. The PX27 Mercury battery was withdrawn for environmental reasons a long time ago. Several replacement options are available.
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Photo © 2022 F.W. Stutterheim [Rolleiflex 6008i, Carl Zeiss Makro-Planar 4/120 mm PQS HFT]
Size 110 film
Lomography
Size 110 film cartridges are available from Lomography. On offer are a B/W film, colour-negative films and a colour-reversal (slide) film. Be aware that product names are confusing and some films have a weird and wild colour (of-)balance. Colour-negative films are also labeled as ‘chromes’. Please find offers on their website.
Lomography
Films, etc.

Photo © 2022 F.W. Stutterheim [Rolleiflex 6008i, Carl Zeiss Makro-Planar 4/120 mm PQS HFT]
PX27 replacements
Battery or button cells
The output of the original PX27 Mercury battery was 5.6 V. Type 4LR43 replacement alkaline batteries deliver 6 V. According to FFS + Tritec and Aperture Preview that is not problem with the Rollei A 110. In the Rollei E 110, 6 V causes the light-meter to deviate. I received my A 110 with a 4LR43 alkaline battery. A disadvantage of alkaline batteries is the gradual drop in voltage with use. Silver oxide batteries (4SR43) do not have this disadvantage. There is however another problem with the size of both batteries. Both are 20.4 mm tall and that is slightly too tall. It is possible to squeeze it in, but it is difficult to remove the battery from the camera and it will damage the camera body. I have read at Aperture Preview that a stack of three size 44 and one size 54 button cells would be a more comfortable solution. Its voltage is 4 × 1.55 = 6.2 V. I calculated the height of this stack to be 19.4 mm. By the way, a generous tolerance is allowed for battery dimensions. I prefer the Silver oxide (SR) cells over Alkali (LR) cells. That makes 3 × SR44 + 1 × SR54. I have tested this set, it fits nicely and the light-meter shows the green light indicating sufficient light for exposure. SR44 button cells are readily available. I am not sure about the smaller SR54. I obtained both sizes from a specialised on-line battery shop.
PX27 adaptors
C.R.I.S. and FFS + Tritec offer PX27-adaptors. Both adaptors are of a ‘Non Voltage Transformation Type’. The CRIS one takes 4 SR43 cells (dia 11.6 × h 4.2 mm). The FFS adaptor has a similar built with 4 button cells. I see no point in purchasing these ‘Non Voltage Transformation’ adaptors. The camera has a removable battery holder that nicely takes 4 cells and the above described set of 3 × SR44 + 1 × SR54 has exactly the right height and works fine.
Small Battery Company offers a PX27-adaptor with a ‘Voltage Reducing Converter’. The output voltage is 5.6 V. It also works with 4 SR43 button cells. The voltage reduction makes this one suitable for E 110 cameras. According to its manufacturer this adaptor is 20.5 mm tall. That would make it slightly too tall. Unfortunately Small Battery Company ship only to U.K. and EFTA addresses.
Suppliers
European Union
FFS + Tritec Foto und Video Geräute Service.
Check their shop for the PX27-adaptor.
FotoImpex, Germany
Film, photographic paper, chemicals, etc. Lomography films.
Macodirect, Germany
Lomography films, etc.
Retrocamera, Belgium
35 mm film, roll film 120 and 127, 110 film ,photographic paper, chemicals, dark room stuff, etc. Look for
110 film under ‘Rarities’. Lomography films.
United Kingdom
Silverprint, Poole, U.K.
Film, photographic paper, chemicals, etc. Lomography films.
Small Battery Company
PX27-adaptor with ‘Voltage Reducing Converter’.
North America
Adorama
Lomography films.
B & H Photo Video
Lomography films.
C.R.I.S.
PX27-adaptor.
Freestyle Photographic Supplies, Los Angeles, CA
Since 1946, Freestyle Photographic Supplies has provided photographic enthusiasts and
professionals across America with quality photographic products. Lomography films.