HQRP 2-Pack Gumstick Battery Compatible with Sony NC-5WM, NC-6WM, WM-701C, 1-528-231-11, WM-RX707, WM-F100, WM-FX675

I got these to use in a Sony wm-ex633 Walkman. These batteries should work for all of the EX series cassette Walkmen and it did in mine. Finding an original charger or one made for gum stick batteries is hard and expensive but you can just use any universal charger that has an adjustable negative pole and takes up to C or D batteries. I got the one that was frequently bought together with these batteries that Amazon recommended. The thing about the new old stock or used gum stick batteries you can find used is that they’re known not to hold a charge long at all. These may be cheap quality in some people’s eyes but they’re definitely reliable and one of the only sources of these batteries still made today so I’m glad to be able to find these. And like I said, no need to buy a special charger for these. A universal charger that can charge NiMh batteries and is long enough to fit these will do the trick even if they claim to only support cylindrical batteries.

These are definitely the best gum stick battery available on Amazon. Worked great in my vintage sony walkman. I have found that the best ones I've used are from/made in Australia available on ebay.

Quise recuperar mi viejo walkman Sony FM 100. Pero ha de haber alguna falla en el equipo. Porqué ya no hay walkmans ?

This was a replacement battery for my Sony portable disc recorder. I charged correctly and is functioning as it should.

I read the other reviews and they worried me... not to worry! These both were fully charged right out of the package and powered up my old Sony NetMD Walkman Mini-Disk. While I don't use it that often, it's good to know that it'll be ready to go when I need it. Of course, I can't vouch for their charging cycles or life expectance. DC Bill

like the title says, the batteries work (in my case for a minidisc player) but they just don't last very long at all.

For old Walkman and wasn’t sure it would work. Fit perfectly and now works. I’m so happy.

These do not hold a charge at all. Not recommended.

We bought these as my son bought a 90s walkman and this is the battery type that it uses….I’d never heard of or seen them before. They charged quickly and seem to work fine. As far as I know he has had to recharge any since the first time

Prompt delivery, charged and working fine in my old classic Sony Walkman WM-600 unit purchased in Japan so many moons ago. Only complaint is the green wrap colour - no much though to aesthetics here. Can't really comment on battery life or long term use yet.

Llegaron en tiempo y forma y para el producto que es llego en un empaque adecuado, ahora sólo queda esperar a que duren las baterías un buen tiempo.

Las pilas resultaron muy útiles, duran varias horas trabajando y son de vuena calidad. Es lo que esperaba de este producto.

Well, my portable CD works after installing them!!