220 uf 16v caps...

http://www.ebay.com/itm/BRAND-NEW-20pcs-NIPPON-SME-BP-Bi-Polar-16V220UF-16v-85-C-10X12-5mm-CAPACITOR-/271092338444?pt=LH_DefaultDomain_0&hash=item3f1e5ccf0c

But wait... are these not electrolytic?!

These are electrolytic and bi-polar, useful in speaker split filters. No + and -

For decoupling, buy another type, often smaller and cheaper

Pelle

They looks like electrolytics to me, why do you say they aren't?


Rob

https://www.google.com.au/search?output=search&sclient=psy-ab&q=electrolytic+capacitor+reverse+polarity&oq=electrolytic+capacitor+revr&gs_l=hp.3.0.0i22i30l3.1296.15425.1.17271.18.18.0.0.0.0.422.5404.2-12j5j1.18.0....0...1c.1.29.hp..0.18.5399.-wxfXlz2el4&bav=on.2,or.r_cp.r_qf.&bvm=bv.55123115%2Cd.aGc%2Cpv.xjs.s.en_US.Ag3CcnQBszM.O&biw=1047&bih=858&dpr=1&ech=1&psi=ReFpUrL1LKSjigftwIGoBA.1382670669364.3&emsg=NCSR&noj=1&ei=ReFpUrL1LKSjigftwIGoBA

always believed it to not be possible to reverse charge all electrolytic caps.....

From Wikipedia
Special bipolar capacitors designed for AC operation are available, usually referred to as “non-polarized” or “NP” types. In these, full-thickness oxide layers are formed on both the aluminum foil strips prior to assembly. On the alternate halves of the AC cycles, one of the foil strips acts as a blocking diode, preventing reverse current from damaging the electrolyte of the other one.

You can also make your own BP. take 2 electrolytic and connect + to+ and use the - , can not withstand so high voltage but it works.
Pelle